56551515 has 8 divisors (see below), whose sum is σ = 90482448. Its totient is φ = 30160800.

The previous prime is 56551513. The next prime is 56551519. The reversal of 56551515 is 51515565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56551515 - 2¹ = 56551513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56551511) 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, 1885036 + ... + 1885065.

It is an arithmetic number, because the mean of its divisors is an integer number (11310306).

Almost surely, 2^56551515 is an apocalyptic number.

56551515 is a deficient number, since it is larger than the sum of its proper divisors (33930933).

56551515 is a wasteful number, since it uses less digits than its factorization.

56551515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770109.

The product of its digits is 18750, while the sum is 33.

The square root of 56551515 is about 7520.0741352729. The cubic root of 56551515 is about 383.8381004246.

The spelling of 56551515 in words is "fifty-six million, five hundred fifty-one thousand, five hundred fifteen".