57215072 has 24 divisors (see below), whose sum is σ = 114492672. Its totient is φ = 28137600.

The previous prime is 57215071. The next prime is 57215077. The reversal of 57215072 is 27051275.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57215071) 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, 12704 + ... + 16607.

It is an arithmetic number, because the mean of its divisors is an integer number (4770528).

Almost surely, 2^57215072 is an apocalyptic number.

It is an amenable number.

57215072 is an abundant number, since it is smaller than the sum of its proper divisors (57277600).

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

57215072 is a wasteful number, since it uses less digits than its factorization.

57215072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29382 (or 29374 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 57215072 is about 7564.0645158539. The cubic root of 57215072 is about 385.3335435265. Note that the first 3 decimals are identical.

The spelling of 57215072 in words is "fifty-seven million, two hundred fifteen thousand, seventy-two".