55631812 has 6 divisors (see below), whose sum is σ = 97355678. Its totient is φ = 27815904.

The previous prime is 55631801. The next prime is 55631813. The reversal of 55631812 is 21813655.

It can be written as a sum of positive squares in only one way, i.e., 55562116 + 69696 = 7454^2 + 264^2 .

It is not an unprimeable number, because it can be changed into a prime (55631813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6953973 + ... + 6953980.

Almost surely, 2^55631812 is an apocalyptic number.

It is an amenable number.

55631812 is a deficient number, since it is larger than the sum of its proper divisors (41723866).

55631812 is a wasteful number, since it uses less digits than its factorization.

55631812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13907957 (or 13907955 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 55631812 is about 7458.6736086251. The cubic root of 55631812 is about 381.7459180426.

The spelling of 55631812 in words is "fifty-five million, six hundred thirty-one thousand, eight hundred twelve".