220570657 has 2 divisors, whose sum is σ = 220570658. Its totient is φ = 220570656.

The previous prime is 220570643. The next prime is 220570661. The reversal of 220570657 is 756075022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220106896 + 463761 = 14836^2 + 681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220570657 is a prime.

It is not a weakly prime, because it can be changed into another prime (220570687) 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 as a sum of consecutive naturals, namely, 110285328 + 110285329.

It is an arithmetic number, because the mean of its divisors is an integer number (110285329).

Almost surely, 2^220570657 is an apocalyptic number.

It is an amenable number.

220570657 is a deficient number, since it is larger than the sum of its proper divisors (1).

220570657 is an equidigital number, since it uses as much as digits as its factorization.

220570657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 220570657 is about 14851.6213592995. The cubic root of 220570657 is about 604.2025848885.

The spelling of 220570657 in words is "two hundred twenty million, five hundred seventy thousand, six hundred fifty-seven".