55591512 has 32 divisors (see below), whose sum is σ = 139398000. Its totient is φ = 18474624.

The previous prime is 55591507. The next prime is 55591517. The reversal of 55591512 is 21519555.

It is an interprime number because it is at equal distance from previous prime (55591507) and next prime (55591517).

It is a super-2 number, since 2×55591512² = 6180832412892288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55591517) 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, 5058 + ... + 11694.

Almost surely, 2^55591512 is an apocalyptic number.

It is an amenable number.

55591512 is an abundant number, since it is smaller than the sum of its proper divisors (83806488).

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

55591512 is a wasteful number, since it uses less digits than its factorization.

55591512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6995 (or 6991 counting only the distinct ones).

The product of its digits is 11250, while the sum is 33.

The square root of 55591512 is about 7455.9715664694. The cubic root of 55591512 is about 381.6537161394.

The spelling of 55591512 in words is "fifty-five million, five hundred ninety-one thousand, five hundred twelve".