222640057 has 8 divisors (see below), whose sum is σ = 228536712. Its totient is φ = 216816000.

The previous prime is 222640049. The next prime is 222640073. The reversal of 222640057 is 750046222.

It can be written as a sum of positive squares in 4 ways, for example, as 39200121 + 183439936 = 6261^2 + 13544^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222640057 - 2³ = 222640049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222640087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11908 + ... + 24229.

It is an arithmetic number, because the mean of its divisors is an integer number (28567089).

Almost surely, 2^222640057 is an apocalyptic number.

It is an amenable number.

222640057 is a deficient number, since it is larger than the sum of its proper divisors (5896655).

222640057 is a wasteful number, since it uses less digits than its factorization.

222640057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36299.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 222640057 is about 14921.1278729190. The cubic root of 222640057 is about 606.0862546824.

Adding to 222640057 its reverse (750046222), we get a palindrome (972686279).

The spelling of 222640057 in words is "two hundred twenty-two million, six hundred forty thousand, fifty-seven".