57522420 has 96 divisors (see below), whose sum is σ = 183859200. Its totient is φ = 14919552.

The previous prime is 57522401. The next prime is 57522427. The reversal of 57522420 is 2422575.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57522427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18541 + ... + 21419.

It is an arithmetic number, because the mean of its divisors is an integer number (1915200).

Almost surely, 2^57522420 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 57522420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91929600).

57522420 is an abundant number, since it is smaller than the sum of its proper divisors (126336780).

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

57522420 is a wasteful number, since it uses less digits than its factorization.

57522420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934 (or 2926 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 57522420 is about 7584.3536309959. The cubic root of 57522420 is about 386.0222901390.

Adding to 57522420 its reverse (2422575), we get a palindrome (59944995).

The spelling of 57522420 in words is "fifty-seven million, five hundred twenty-two thousand, four hundred twenty".