57512520 has 96 divisors (see below), whose sum is σ = 201310200. Its totient is φ = 14155776.

The previous prime is 57512519. The next prime is 57512527. The reversal of 57512520 is 2521575.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44595684 + 12916836 = 6678^2 + 3594^2 .

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (57512527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1465 + ... + 10824.

Almost surely, 2^57512520 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 57512520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100655100).

57512520 is an abundant number, since it is smaller than the sum of its proper divisors (143797680).

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

57512520 is a wasteful number, since it uses less digits than its factorization.

57512520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12319 (or 12312 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 57512520 is about 7583.7009434708. The cubic root of 57512520 is about 386.0001431805. Note that the first 3 decimals are identical.

The spelling of 57512520 in words is "fifty-seven million, five hundred twelve thousand, five hundred twenty".