55015856 has 20 divisors (see below), whose sum is σ = 121821072. Its totient is φ = 23578176.

The previous prime is 55015853. The next prime is 55015867. The reversal of 55015856 is 65851055.

It is a super-2 number, since 2×55015856² = 6053488822825472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55015853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245495 + ... + 245718.

Almost surely, 2^55015856 is an apocalyptic number.

55015856 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55015856 is an abundant number, since it is smaller than the sum of its proper divisors (66805216).

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

55015856 is a wasteful number, since it uses less digits than its factorization.

55015856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491228 (or 491222 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 55015856 is about 7417.2674213621. The cubic root of 55015856 is about 380.3317877856.

The spelling of 55015856 in words is "fifty-five million, fifteen thousand, eight hundred fifty-six".