15492981 has 16 divisors (see below), whose sum is σ = 23943168. Its totient is φ = 8727600.

The previous prime is 15492979. The next prime is 15492991. The reversal of 15492981 is 18929451.

It is not a de Polignac number, because 15492981 - 2¹ = 15492979 is a prime.

It is a super-2 number, since 2×15492981² = 480064920532722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15492941) 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, 3705 + ... + 6686.

It is an arithmetic number, because the mean of its divisors is an integer number (1496448).

Almost surely, 2^15492981 is an apocalyptic number.

It is an amenable number.

15492981 is a deficient number, since it is larger than the sum of its proper divisors (8450187).

15492981 is a wasteful number, since it uses less digits than its factorization.

15492981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10472.

The product of its digits is 25920, while the sum is 39.

The square root of 15492981 is about 3936.1124221750. The cubic root of 15492981 is about 249.2939062708.

The spelling of 15492981 in words is "fifteen million, four hundred ninety-two thousand, nine hundred eighty-one".