55791512 has 32 divisors (see below), whose sum is σ = 120683520. Its totient is φ = 23684640.

The previous prime is 55791509. The next prime is 55791553. The reversal of 55791512 is 21519755.

It is a super-2 number, since 2×55791512² = 6225385622492288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1337 + ... + 10647.

It is an arithmetic number, because the mean of its divisors is an integer number (3771360).

Almost surely, 2^55791512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55791512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60341760).

55791512 is an abundant number, since it is smaller than the sum of its proper divisors (64892008).

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

55791512 is a wasteful number, since it uses less digits than its factorization.

55791512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431 (or 9427 counting only the distinct ones).

The product of its digits is 15750, while the sum is 35.

The square root of 55791512 is about 7469.3715933805. The cubic root of 55791512 is about 382.1108565994.

The spelling of 55791512 in words is "fifty-five million, seven hundred ninety-one thousand, five hundred twelve".