57222320 has 40 divisors (see below), whose sum is σ = 133436400. Its totient is φ = 22821120.

The previous prime is 57222301. The next prime is 57222329. The reversal of 57222320 is 2322275.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (57222329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32831 + ... + 34529.

It is an arithmetic number, because the mean of its divisors is an integer number (3335910).

Almost surely, 2^57222320 is an apocalyptic number.

It is an amenable number.

57222320 is an abundant number, since it is smaller than the sum of its proper divisors (76214080).

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

57222320 is a wasteful number, since it uses less digits than its factorization.

57222320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 57222320 is about 7564.5436081762. The cubic root of 57222320 is about 385.3498141786.

Adding to 57222320 its reverse (2322275), we get a palindrome (59544595).

The spelling of 57222320 in words is "fifty-seven million, two hundred twenty-two thousand, three hundred twenty".