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108144481 = 145174531
BaseRepresentation
bin1100111001000…
…10011101100001
321112111022100011
412130202131201
5210141110411
614421524521
72452133014
oct634423541
9245438304
10108144481
1156054605
1230273741
1319535923
141051137b
159762c21
hex6722761

108144481 has 4 divisors (see below), whose sum is σ = 108220464. Its totient is φ = 108068500.

The previous prime is 108144473. The next prime is 108144493. The reversal of 108144481 is 184441801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184441801 = 193955657.

It is a cyclic number.

It is not a de Polignac number, because 108144481 - 23 = 108144473 is a prime.

It is a super-3 number, since 3×1081444813 (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108444481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35815 + ... + 38716.

It is an arithmetic number, because the mean of its divisors is an integer number (27055116).

Almost surely, 2108144481 is an apocalyptic number.

It is an amenable number.

108144481 is a deficient number, since it is larger than the sum of its proper divisors (75983).

108144481 is an equidigital number, since it uses as much as digits as its factorization.

108144481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75982.

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 108144481 is about 10399.2538674657. The cubic root of 108144481 is about 476.4325814181.

The spelling of 108144481 in words is "one hundred eight million, one hundred forty-four thousand, four hundred eighty-one".

Divisors: 1 1451 74531 108144481