55515612 has 48 divisors (see below), whose sum is σ = 132804000. Its totient is φ = 18044160.

The previous prime is 55515611. The next prime is 55515617. The reversal of 55515612 is 21651555.

It is a self number, because there is not a number n which added to its sum of digits gives 55515612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55515611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108814 + ... + 109322.

It is an arithmetic number, because the mean of its divisors is an integer number (2766750).

Almost surely, 2^55515612 is an apocalyptic number.

It is an amenable number.

55515612 is an abundant number, since it is smaller than the sum of its proper divisors (77288388).

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

55515612 is a wasteful number, since it uses less digits than its factorization.

55515612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 724 counting only the distinct ones).

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

The square root of 55515612 is about 7450.8799480330. The cubic root of 55515612 is about 381.4799443453.

The spelling of 55515612 in words is "fifty-five million, five hundred fifteen thousand, six hundred twelve".