315523129 has 2 divisors, whose sum is σ = 315523130. Its totient is φ = 315523128.

The previous prime is 315523099. The next prime is 315523133. The reversal of 315523129 is 921325513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273571600 + 41951529 = 16540^2 + 6477^2 .

It is a cyclic number.

It is not a de Polignac number, because 315523129 - 2¹¹ = 315521081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315523129.

It is not a weakly prime, because it can be changed into another prime (315523199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157761564 + 157761565.

It is an arithmetic number, because the mean of its divisors is an integer number (157761565).

Almost surely, 2^315523129 is an apocalyptic number.

It is an amenable number.

315523129 is a deficient number, since it is larger than the sum of its proper divisors (1).

315523129 is an equidigital number, since it uses as much as digits as its factorization.

315523129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 31.

The square root of 315523129 is about 17762.9707256416. The cubic root of 315523129 is about 680.7856612581.

The spelling of 315523129 in words is "three hundred fifteen million, five hundred twenty-three thousand, one hundred twenty-nine".