57215288 has 48 divisors (see below), whose sum is σ = 117595800. Its totient is φ = 26083200.

The previous prime is 57215281. The next prime is 57215293. The reversal of 57215288 is 88251275.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57215281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136343 + ... + 136761.

Almost surely, 2^57215288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57215288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58797900).

57215288 is an abundant number, since it is smaller than the sum of its proper divisors (60380512).

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

57215288 is a wasteful number, since it uses less digits than its factorization.

57215288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 535 counting only the distinct ones).

The product of its digits is 44800, while the sum is 38.

The square root of 57215288 is about 7564.0787938783. The cubic root of 57215288 is about 385.3340284334.

The spelling of 57215288 in words is "fifty-seven million, two hundred fifteen thousand, two hundred eighty-eight".