488931221 has 2 divisors, whose sum is σ = 488931222. Its totient is φ = 488931220.

The previous prime is 488931197. The next prime is 488931239. The reversal of 488931221 is 122139884.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431019121 + 57912100 = 20761^2 + 7610^2 .

It is a cyclic number.

It is not a de Polignac number, because 488931221 - 2¹⁴ = 488914837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (488931251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244465610 + 244465611.

It is an arithmetic number, because the mean of its divisors is an integer number (244465611).

Almost surely, 2^488931221 is an apocalyptic number.

It is an amenable number.

488931221 is a deficient number, since it is larger than the sum of its proper divisors (1).

488931221 is an equidigital number, since it uses as much as digits as its factorization.

488931221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 488931221 is about 22111.7891858619. The cubic root of 488931221 is about 787.7999037793.

The spelling of 488931221 in words is "four hundred eighty-eight million, nine hundred thirty-one thousand, two hundred twenty-one".