470931221 has 2 divisors, whose sum is σ = 470931222. Its totient is φ = 470931220.

The previous prime is 470931151. The next prime is 470931239. The reversal of 470931221 is 122139074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467640625 + 3290596 = 21625^2 + 1814^2 .

It is a cyclic number.

It is not a de Polignac number, because 470931221 - 2¹⁸ = 470669077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (470931521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235465610 + 235465611.

It is an arithmetic number, because the mean of its divisors is an integer number (235465611).

Almost surely, 2^470931221 is an apocalyptic number.

It is an amenable number.

470931221 is a deficient number, since it is larger than the sum of its proper divisors (1).

470931221 is an equidigital number, since it uses as much as digits as its factorization.

470931221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 470931221 is about 21700.9497718418. The cubic root of 470931221 is about 778.0111620932.

The spelling of 470931221 in words is "four hundred seventy million, nine hundred thirty-one thousand, two hundred twenty-one".