315491329 has 4 divisors (see below), whose sum is σ = 320663380. Its totient is φ = 310319280.

The previous prime is 315491303. The next prime is 315491339. The reversal of 315491329 is 923194513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 923194513 = 571 ⋅1616803.

It can be written as a sum of positive squares in 2 ways, for example, as 91240704 + 224250625 = 9552^2 + 14975^2 .

It is a cyclic number.

It is not a de Polignac number, because 315491329 - 2⁹ = 315490817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315491339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2585934 + ... + 2586055.

It is an arithmetic number, because the mean of its divisors is an integer number (80165845).

Almost surely, 2^315491329 is an apocalyptic number.

It is an amenable number.

315491329 is a deficient number, since it is larger than the sum of its proper divisors (5172051).

315491329 is an equidigital number, since it uses as much as digits as its factorization.

315491329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5172050.

The product of its digits is 29160, while the sum is 37.

The square root of 315491329 is about 17762.0755825438. The cubic root of 315491329 is about 680.7627894944.

The spelling of 315491329 in words is "three hundred fifteen million, four hundred ninety-one thousand, three hundred twenty-nine".