57213072 has 120 divisors (see below), whose sum is σ = 184541760. Its totient is φ = 16208640.

The previous prime is 57213043. The next prime is 57213077. The reversal of 57213072 is 27031275.

It is not an unprimeable number, because it can be changed into a prime (57213077) 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, 212554 + ... + 212822.

It is an arithmetic number, because the mean of its divisors is an integer number (1537848).

Almost surely, 2^57213072 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 57213072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92270880).

57213072 is an abundant number, since it is smaller than the sum of its proper divisors (127328688).

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

57213072 is a wasteful number, since it uses less digits than its factorization.

57213072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 57213072 is about 7563.9323106437. The cubic root of 57213072 is about 385.3290535903.

The spelling of 57213072 in words is "fifty-seven million, two hundred thirteen thousand, seventy-two".