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100108465 = 520021693
BaseRepresentation
bin1011111011110…
…00100010110001
320222101000222221
411331320202301
5201111432330
613533401041
72323623262
oct575704261
9228330887
10100108465
1151565a76
1229639181
1317980ca2
14d41c969
158bc6b7a
hex5f788b1

100108465 has 4 divisors (see below), whose sum is σ = 120130164. Its totient is φ = 80086768.

The previous prime is 100108457. The next prime is 100108469. The reversal of 100108465 is 564801001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564801001 = 4313134907.

It can be written as a sum of positive squares in 2 ways, for example, as 44635761 + 55472704 = 6681^2 + 7448^2 .

It is a cyclic number.

It is not a de Polignac number, because 100108465 - 23 = 100108457 is a prime.

It is a super-3 number, since 3×1001084653 (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100108469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10010842 + ... + 10010851.

It is an arithmetic number, because the mean of its divisors is an integer number (30032541).

Almost surely, 2100108465 is an apocalyptic number.

It is an amenable number.

100108465 is a deficient number, since it is larger than the sum of its proper divisors (20021699).

100108465 is an equidigital number, since it uses as much as digits as its factorization.

100108465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20021698.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 100108465 is about 10005.4217802150. The cubic root of 100108465 is about 464.3266393680.

Adding to 100108465 its reverse (564801001), we get a palindrome (664909466).

The spelling of 100108465 in words is "one hundred million, one hundred eight thousand, four hundred sixty-five".

Divisors: 1 5 20021693 100108465