315122013 has 12 divisors (see below), whose sum is σ = 481951548. Its totient is φ = 197723520.

The previous prime is 315121999. The next prime is 315122053. The reversal of 315122013 is 310221513.

It can be written as a sum of positive squares in 2 ways, for example, as 90212004 + 224910009 = 9498^2 + 14997^2 .

It is not a de Polignac number, because 315122013 - 2¹⁴ = 315105629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315122053) 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 in 11 ways as a sum of consecutive naturals, for example, 1029658 + ... + 1029963.

It is an arithmetic number, because the mean of its divisors is an integer number (40162629).

Almost surely, 2^315122013 is an apocalyptic number.

It is an amenable number.

315122013 is a deficient number, since it is larger than the sum of its proper divisors (166829535).

315122013 is a wasteful number, since it uses less digits than its factorization.

315122013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059644 (or 2059641 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 315122013 is about 17751.6763433767. The cubic root of 315122013 is about 680.4970508044.

Adding to 315122013 its reverse (310221513), we get a palindrome (625343526).

The spelling of 315122013 in words is "three hundred fifteen million, one hundred twenty-two thousand, thirteen".