315525974209 has 2 divisors, whose sum is σ = 315525974210. Its totient is φ = 315525974208.

The previous prime is 315525974207. The next prime is 315525974227. The reversal of 315525974209 is 902479525513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258340425984 + 57185548225 = 508272^2 + 239135^2 .

It is an emirp because it is prime and its reverse (902479525513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315525974209 - 2¹ = 315525974207 is a prime.

Together with 315525974207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (315525974207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157762987104 + 157762987105.

It is an arithmetic number, because the mean of its divisors is an integer number (157762987105).

Almost surely, 2^315525974209 is an apocalyptic number.

It is an amenable number.

315525974209 is a deficient number, since it is larger than the sum of its proper divisors (1).

315525974209 is an equidigital number, since it uses as much as digits as its factorization.

315525974209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402000, while the sum is 52.

The spelling of 315525974209 in words is "three hundred fifteen billion, five hundred twenty-five million, nine hundred seventy-four thousand, two hundred nine".