55815886 has 16 divisors (see below), whose sum is σ = 96046560. Its totient is φ = 23830560.

The previous prime is 55815857. The next prime is 55815889. The reversal of 55815886 is 68851855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55815889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3645 + ... + 11176.

It is an arithmetic number, because the mean of its divisors is an integer number (6002910).

Almost surely, 2^55815886 is an apocalyptic number.

55815886 is a deficient number, since it is larger than the sum of its proper divisors (40230674).

55815886 is a wasteful number, since it uses less digits than its factorization.

55815886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15099.

The product of its digits is 384000, while the sum is 46.

The square root of 55815886 is about 7471.0030116444. The cubic root of 55815886 is about 382.1664935814.

The spelling of 55815886 in words is "fifty-five million, eight hundred fifteen thousand, eight hundred eighty-six".