57142722 has 48 divisors (see below), whose sum is σ = 143180352. Its totient is φ = 15069600.

The previous prime is 57142699. The next prime is 57142733. The reversal of 57142722 is 22724175.

It is a self number, because there is not a number n which added to its sum of digits gives 57142722.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3654 + ... + 11297.

It is an arithmetic number, because the mean of its divisors is an integer number (2982924).

Almost surely, 2^57142722 is an apocalyptic number.

57142722 is an abundant number, since it is smaller than the sum of its proper divisors (86037630).

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

57142722 is a wasteful number, since it uses less digits than its factorization.

57142722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14983 (or 14976 counting only the distinct ones).

The product of its digits is 7840, while the sum is 30.

The square root of 57142722 is about 7559.2805213195. The cubic root of 57142722 is about 385.1710534672.

Adding to 57142722 its reverse (22724175), we get a palindrome (79866897).

The spelling of 57142722 in words is "fifty-seven million, one hundred forty-two thousand, seven hundred twenty-two".