470221657 has 2 divisors, whose sum is σ = 470221658. Its totient is φ = 470221656.

The previous prime is 470221613. The next prime is 470221669. The reversal of 470221657 is 756122074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455352921 + 14868736 = 21339^2 + 3856^2 .

It is a cyclic number.

It is not a de Polignac number, because 470221657 - 2²³ = 461833049 is a prime.

It is a super-2 number, since 2×470221657² = 442216813423651298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (470221057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235110828 + 235110829.

It is an arithmetic number, because the mean of its divisors is an integer number (235110829).

Almost surely, 2^470221657 is an apocalyptic number.

It is an amenable number.

470221657 is a deficient number, since it is larger than the sum of its proper divisors (1).

470221657 is an equidigital number, since it uses as much as digits as its factorization.

470221657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 470221657 is about 21684.5949235857. The cubic root of 470221657 is about 777.6202159692.

The spelling of 470221657 in words is "four hundred seventy million, two hundred twenty-one thousand, six hundred fifty-seven".