57242556 has 36 divisors (see below), whose sum is σ = 165368112. Its totient is φ = 16354944.

The previous prime is 57242551. The next prime is 57242579. The reversal of 57242556 is 65524275.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 57242556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57242551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113325 + ... + 113828.

Almost surely, 2^57242556 is an apocalyptic number.

It is an amenable number.

57242556 is an abundant number, since it is smaller than the sum of its proper divisors (108125556).

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

57242556 is a wasteful number, since it uses less digits than its factorization.

57242556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227170 (or 227165 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 57242556 is about 7565.8810458532. The cubic root of 57242556 is about 385.3952336339.

The spelling of 57242556 in words is "fifty-seven million, two hundred forty-two thousand, five hundred fifty-six".