531329257 has 2 divisors, whose sum is σ = 531329258. Its totient is φ = 531329256.

The previous prime is 531329221. The next prime is 531329261. The reversal of 531329257 is 752923135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455011561 + 76317696 = 21331^2 + 8736^2 .

It is a cyclic number.

It is not a de Polignac number, because 531329257 - 2¹⁵ = 531296489 is a prime.

It is not a weakly prime, because it can be changed into another prime (531329857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265664628 + 265664629.

It is an arithmetic number, because the mean of its divisors is an integer number (265664629).

Almost surely, 2^531329257 is an apocalyptic number.

It is an amenable number.

531329257 is a deficient number, since it is larger than the sum of its proper divisors (1).

531329257 is an equidigital number, since it uses as much as digits as its factorization.

531329257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 37.

The square root of 531329257 is about 23050.5804048401. The cubic root of 531329257 is about 809.9432246950.

The spelling of 531329257 in words is "five hundred thirty-one million, three hundred twenty-nine thousand, two hundred fifty-seven".