55315512 has 72 divisors (see below), whose sum is σ = 174283200. Its totient is φ = 15803424.

The previous prime is 55315493. The next prime is 55315523. The reversal of 55315512 is 21551355.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4312 + ... + 11367.

It is an arithmetic number, because the mean of its divisors is an integer number (2420600).

Almost surely, 2^55315512 is an apocalyptic number.

It is an amenable number.

55315512 is an abundant number, since it is smaller than the sum of its proper divisors (118967688).

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

55315512 is a wasteful number, since it uses less digits than its factorization.

55315512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15705 (or 15691 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 55315512 is about 7437.4398821100. The cubic root of 55315512 is about 381.0210582115.

Adding to 55315512 its reverse (21551355), we get a palindrome (76866867).

The spelling of 55315512 in words is "fifty-five million, three hundred fifteen thousand, five hundred twelve".