57216525 has 48 divisors (see below), whose sum is σ = 101243520. Its totient is φ = 28441600.

The previous prime is 57216503. The next prime is 57216527. The reversal of 57216525 is 52561275.

It is a de Polignac number, because none of the positive numbers 2^k-57216525 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57216527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70321 + ... + 71129.

It is an arithmetic number, because the mean of its divisors is an integer number (2109240).

Almost surely, 2^57216525 is an apocalyptic number.

It is an amenable number.

57216525 is a deficient number, since it is larger than the sum of its proper divisors (44026995).

57216525 is a wasteful number, since it uses less digits than its factorization.

57216525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 881 counting only the distinct ones).

The product of its digits is 21000, while the sum is 33.

The square root of 57216525 is about 7564.1605614900. The cubic root of 57216525 is about 385.3368053996.

It can be divided in two parts, 5721 and 6525, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 57216525 in words is "fifty-seven million, two hundred sixteen thousand, five hundred twenty-five".