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80550101 = 194239479
BaseRepresentation
bin1001100110100…
…01100011010101
312121120100222002
410303101203111
5131110100401
611554245045
71665443642
oct463214325
9177510862
1080550101
1141517535
1222b86785
13138c38a8
14a9aadc9
157111a6b
hex4cd18d5

80550101 has 4 divisors (see below), whose sum is σ = 84789600. Its totient is φ = 76310604.

The previous prime is 80550091. The next prime is 80550181. The reversal of 80550101 is 10105508.

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.

It is a cyclic number.

It is not a de Polignac number, because 80550101 - 26 = 80550037 is a prime.

It is a super-2 number, since 2×805501012 = 12976637542220402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80550181) 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, 2119721 + ... + 2119758.

It is an arithmetic number, because the mean of its divisors is an integer number (21197400).

Almost surely, 280550101 is an apocalyptic number.

It is an amenable number.

80550101 is a deficient number, since it is larger than the sum of its proper divisors (4239499).

80550101 is a wasteful number, since it uses less digits than its factorization.

80550101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239498.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 80550101 is about 8974.9708077520. The cubic root of 80550101 is about 431.8723134436.

Adding to 80550101 its reverse (10105508), we get a palindrome (90655609).

The spelling of 80550101 in words is "eighty million, five hundred fifty thousand, one hundred one".

Divisors: 1 19 4239479 80550101