57257216 has 36 divisors (see below), whose sum is σ = 114987264. Its totient is φ = 28454400.

The previous prime is 57257183. The next prime is 57257219. The reversal of 57257216 is 61275275.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57257219) 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 3 ways as a sum of consecutive naturals, for example, 48311 + ... + 49481.

Almost surely, 2^57257216 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 57257216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57493632).

57257216 is an abundant number, since it is smaller than the sum of its proper divisors (57730048).

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

57257216 is a wasteful number, since it uses less digits than its factorization.

57257216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378 (or 1364 counting only the distinct ones).

The product of its digits is 29400, while the sum is 35.

The square root of 57257216 is about 7566.8498068879. The cubic root of 57257216 is about 385.4281311392.

The spelling of 57257216 in words is "fifty-seven million, two hundred fifty-seven thousand, two hundred sixteen".