55415812 has 6 divisors (see below), whose sum is σ = 96977678. Its totient is φ = 27707904.

The previous prime is 55415797. The next prime is 55415821. The reversal of 55415812 is 21851455.

It can be written as a sum of positive squares in only one way, i.e., 51351556 + 4064256 = 7166^2 + 2016^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6926973 + ... + 6926980.

Almost surely, 2^55415812 is an apocalyptic number.

It is an amenable number.

55415812 is a deficient number, since it is larger than the sum of its proper divisors (41561866).

55415812 is a wasteful number, since it uses less digits than its factorization.

55415812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13853957 (or 13853955 counting only the distinct ones).

The product of its digits is 8000, while the sum is 31.

The square root of 55415812 is about 7444.1797399042. The cubic root of 55415812 is about 381.2512126809.

The spelling of 55415812 in words is "fifty-five million, four hundred fifteen thousand, eight hundred twelve".