55512516 has 12 divisors (see below), whose sum is σ = 129529232. Its totient is φ = 18504168.

The previous prime is 55512487. The next prime is 55512517. The reversal of 55512516 is 61521555.

55512516 is digitally balanced in base 2 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

55512516 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (55512517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2313010 + ... + 2313033.

Almost surely, 2^55512516 is an apocalyptic number.

It is an amenable number.

55512516 is an abundant number, since it is smaller than the sum of its proper divisors (74016716).

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

55512516 is a wasteful number, since it uses less digits than its factorization.

55512516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4626050 (or 4626048 counting only the distinct ones).

The product of its digits is 7500, while the sum is 30.

The square root of 55512516 is about 7450.6721844408. The cubic root of 55512516 is about 381.4728527433.

The spelling of 55512516 in words is "fifty-five million, five hundred twelve thousand, five hundred sixteen".