315431089 has 2 divisors, whose sum is σ = 315431090. Its totient is φ = 315431088.

The previous prime is 315431087. The next prime is 315431111. The reversal of 315431089 is 980134513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216090000 + 99341089 = 14700^2 + 9967^2 .

It is a cyclic number.

It is not a de Polignac number, because 315431089 - 2¹ = 315431087 is a prime.

Together with 315431087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (315431087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157715544 + 157715545.

It is an arithmetic number, because the mean of its divisors is an integer number (157715545).

Almost surely, 2^315431089 is an apocalyptic number.

It is an amenable number.

315431089 is a deficient number, since it is larger than the sum of its proper divisors (1).

315431089 is an equidigital number, since it uses as much as digits as its factorization.

315431089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 315431089 is about 17760.3797538228. The cubic root of 315431089 is about 680.7194583925.

It can be divided in two parts, 3154 and 31089, that added together give a palindrome (34243).

The spelling of 315431089 in words is "three hundred fifteen million, four hundred thirty-one thousand, eighty-nine".