15297681 has 16 divisors (see below), whose sum is σ = 23472000. Its totient is φ = 8681088.

The previous prime is 15297649. The next prime is 15297707. The reversal of 15297681 is 18679251.

15297681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15297681 - 2⁵ = 15297649 is a prime.

It is a super-2 number, since 2×15297681² = 468038087955522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15297631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685 + ... + 5573.

It is an arithmetic number, because the mean of its divisors is an integer number (1467000).

Almost surely, 2^15297681 is an apocalyptic number.

It is an amenable number.

15297681 is a deficient number, since it is larger than the sum of its proper divisors (8174319).

15297681 is a wasteful number, since it uses less digits than its factorization.

15297681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5048.

The product of its digits is 30240, while the sum is 39.

The square root of 15297681 is about 3911.2249999201. The cubic root of 15297681 is about 248.2419648958.

The spelling of 15297681 in words is "fifteen million, two hundred ninety-seven thousand, six hundred eighty-one".