15107681 has 6 divisors (see below), whose sum is σ = 15269046. Its totient is φ = 14948000.

The previous prime is 15107669. The next prime is 15107689. The reversal of 15107681 is 18670151.

It can be written as a sum of positive squares in 3 ways, for example, as 9891025 + 5216656 = 3145^2 + 2284^2 .

It is not a de Polignac number, because 15107681 - 2²² = 10913377 is a prime.

It is a super-2 number, since 2×15107681² = 456484050395522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15107689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9461 + ... + 10941.

It is an arithmetic number, because the mean of its divisors is an integer number (2544841).

Almost surely, 2^15107681 is an apocalyptic number.

It is an amenable number.

15107681 is a deficient number, since it is larger than the sum of its proper divisors (161365).

15107681 is an equidigital number, since it uses as much as digits as its factorization.

15107681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 15107681 is about 3886.8600437886. The cubic root of 15107681 is about 247.2099435068.

The spelling of 15107681 in words is "fifteen million, one hundred seven thousand, six hundred eighty-one".