315015121 has 2 divisors, whose sum is σ = 315015122. Its totient is φ = 315015120.

The previous prime is 315015109. The next prime is 315015157. The reversal of 315015121 is 121510513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311169600 + 3845521 = 17640^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 315015121 - 2⁷ = 315014993 is a prime.

It is not a weakly prime, because it can be changed into another prime (315015161) 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, 157507560 + 157507561.

It is an arithmetic number, because the mean of its divisors is an integer number (157507561).

Almost surely, 2^315015121 is an apocalyptic number.

It is an amenable number.

315015121 is a deficient number, since it is larger than the sum of its proper divisors (1).

315015121 is an equidigital number, since it uses as much as digits as its factorization.

315015121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 315015121 is about 17748.6653301030. The cubic root of 315015121 is about 680.4200986885.

Adding to 315015121 its reverse (121510513), we get a palindrome (436525634).

The spelling of 315015121 in words is "three hundred fifteen million, fifteen thousand, one hundred twenty-one".