57722216 has 8 divisors (see below), whose sum is σ = 108229170. Its totient is φ = 28861104.

The previous prime is 57722143. The next prime is 57722233. The reversal of 57722216 is 61222775.

It can be written as a sum of positive squares in only one way, i.e., 57304900 + 417316 = 7570^2 + 646^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3607631 + ... + 3607646.

Almost surely, 2^57722216 is an apocalyptic number.

It is an amenable number.

57722216 is a deficient number, since it is larger than the sum of its proper divisors (50506954).

57722216 is a wasteful number, since it uses less digits than its factorization.

57722216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7215283 (or 7215279 counting only the distinct ones).

The product of its digits is 11760, while the sum is 32.

The square root of 57722216 is about 7597.5138038703. The cubic root of 57722216 is about 386.4687049821.

The spelling of 57722216 in words is "fifty-seven million, seven hundred twenty-two thousand, two hundred sixteen".