55120715 has 32 divisors (see below), whose sum is σ = 76458816. Its totient is φ = 37785600.

The previous prime is 55120669. The next prime is 55120733. The reversal of 55120715 is 51702155.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-55120715 is a prime.

It is a super-2 number, since 2×55120715² = 6076586444222450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91415 + ... + 92015.

It is an arithmetic number, because the mean of its divisors is an integer number (2389338).

Almost surely, 2^55120715 is an apocalyptic number.

55120715 is a deficient number, since it is larger than the sum of its proper divisors (21338101).

55120715 is a wasteful number, since it uses less digits than its factorization.

55120715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 55120715 is about 7424.3326299406. The cubic root of 55120715 is about 380.5732690788.

The spelling of 55120715 in words is "fifty-five million, one hundred twenty thousand, seven hundred fifteen".