57055515 has 16 divisors (see below), whose sum is σ = 99588096. Its totient is φ = 27663200.

The previous prime is 57055457. The next prime is 57055541. The reversal of 57055515 is 51555075.

It is not a de Polignac number, because 57055515 - 2⁸ = 57055259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172731 + ... + 173060.

It is an arithmetic number, because the mean of its divisors is an integer number (6224256).

Almost surely, 2^57055515 is an apocalyptic number.

57055515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

57055515 is a deficient number, since it is larger than the sum of its proper divisors (42532581).

57055515 is a wasteful number, since it uses less digits than its factorization.

57055515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345810.

The product of its (nonzero) digits is 21875, while the sum is 33.

The square root of 57055515 is about 7553.5101112000. The cubic root of 57055515 is about 384.9750138392.

The spelling of 57055515 in words is "fifty-seven million, fifty-five thousand, five hundred fifteen".