15104991 has 32 divisors (see below), whose sum is σ = 22982400. Its totient is φ = 8743680.

The previous prime is 15104989. The next prime is 15105017. The reversal of 15104991 is 19940151.

It is not a de Polignac number, because 15104991 - 2¹ = 15104989 is a prime.

It is a super-2 number, since 2×15104991² = 456321506220162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15104191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108600 + ... + 108738.

It is an arithmetic number, because the mean of its divisors is an integer number (718200).

Almost surely, 2^15104991 is an apocalyptic number.

15104991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15104991 is a deficient number, since it is larger than the sum of its proper divisors (7877409).

15104991 is a wasteful number, since it uses less digits than its factorization.

15104991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 15104991 is about 3886.5139907120. The cubic root of 15104991 is about 247.1952703036.

The spelling of 15104991 in words is "fifteen million, one hundred four thousand, nine hundred ninety-one".