52991508 has 24 divisors (see below), whose sum is σ = 123852960. Its totient is φ = 17634400.

The previous prime is 52991507. The next prime is 52991509. The reversal of 52991508 is 80519925.

It is an interprime number because it is at equal distance from previous prime (52991507) and next prime (52991509).

It is a super-2 number, since 2×52991508² = 5616199840228128, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52991501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4558 + ... + 11258.

It is an arithmetic number, because the mean of its divisors is an integer number (5160540).

Almost surely, 2^52991508 is an apocalyptic number.

It is an amenable number.

52991508 is an abundant number, since it is smaller than the sum of its proper divisors (70861452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52991508 is a wasteful number, since it uses less digits than its factorization.

52991508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367 (or 7365 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 52991508 is about 7279.5266329618. The cubic root of 52991508 is about 375.6085124772.

The spelling of 52991508 in words is "fifty-two million, nine hundred ninety-one thousand, five hundred eight".