55231005612 has 24 divisors (see below), whose sum is σ = 129327733696. Its totient is φ = 18345279888.

The previous prime is 55231005521. The next prime is 55231005629. The reversal of 55231005612 is 21650013255.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55231005612.

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, 8128378 + ... + 8135169.

Almost surely, 2^55231005612 is an apocalyptic number.

It is an amenable number.

55231005612 is an abundant number, since it is smaller than the sum of its proper divisors (74096728084).

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

55231005612 is a wasteful number, since it uses less digits than its factorization.

55231005612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16263837 (or 16263835 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 55231005612 its reverse (21650013255), we get a palindrome (76881018867).

The spelling of 55231005612 in words is "fifty-five billion, two hundred thirty-one million, five thousand, six hundred twelve".