315445129 has 2 divisors, whose sum is σ = 315445130. Its totient is φ = 315445128.

The previous prime is 315445099. The next prime is 315445133. The reversal of 315445129 is 921544513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159769600 + 155675529 = 12640^2 + 12477^2 .

It is a cyclic number.

It is not a de Polignac number, because 315445129 - 2¹³ = 315436937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 315445094 and 315445103.

It is not a weakly prime, because it can be changed into another prime (315445139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157722564 + 157722565.

It is an arithmetic number, because the mean of its divisors is an integer number (157722565).

Almost surely, 2^315445129 is an apocalyptic number.

It is an amenable number.

315445129 is a deficient number, since it is larger than the sum of its proper divisors (1).

315445129 is an equidigital number, since it uses as much as digits as its factorization.

315445129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 315445129 is about 17760.7750112432. The cubic root of 315445129 is about 680.7295579670.

The spelling of 315445129 in words is "three hundred fifteen million, four hundred forty-five thousand, one hundred twenty-nine".