57022220 has 12 divisors (see below), whose sum is σ = 119746704. Its totient is φ = 22808880.

The previous prime is 57022219. The next prime is 57022253. The reversal of 57022220 is 2222075.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2851111 = 57022220 / (5 + 7 + 0 + 2 + 2 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 57022192 and 57022201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1425536 + ... + 1425575.

It is an arithmetic number, because the mean of its divisors is an integer number (9978892).

Almost surely, 2^57022220 is an apocalyptic number.

It is an amenable number.

57022220 is an abundant number, since it is smaller than the sum of its proper divisors (62724484).

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

57022220 is a wasteful number, since it uses less digits than its factorization.

57022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851120 (or 2851118 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 57022220 is about 7551.3058473353. The cubic root of 57022220 is about 384.9001146398.

Adding to 57022220 its reverse (2222075), we get a palindrome (59244295).

The spelling of 57022220 in words is "fifty-seven million, twenty-two thousand, two hundred twenty".