315347261 has 4 divisors (see below), whose sum is σ = 317754624. Its totient is φ = 312939900.

The previous prime is 315347231. The next prime is 315347311. The reversal of 315347261 is 162743513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162743513 = 593 ⋅274441.

It is a cyclic number.

It is not a de Polignac number, because 315347261 - 2²² = 311152957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315347231) 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, 1203485 + ... + 1203746.

It is an arithmetic number, because the mean of its divisors is an integer number (79438656).

Almost surely, 2^315347261 is an apocalyptic number.

It is an amenable number.

315347261 is a deficient number, since it is larger than the sum of its proper divisors (2407363).

315347261 is a wasteful number, since it uses less digits than its factorization.

315347261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407362.

The product of its digits is 15120, while the sum is 32.

The square root of 315347261 is about 17758.0196249469. The cubic root of 315347261 is about 680.6591510771.

The spelling of 315347261 in words is "three hundred fifteen million, three hundred forty-seven thousand, two hundred sixty-one".