315155261 has 4 divisors (see below), whose sum is σ = 331742400. Its totient is φ = 298568124.

The previous prime is 315155251. The next prime is 315155263. The reversal of 315155261 is 162551513.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315155261 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 (315155263) 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, 8293541 + ... + 8293578.

It is an arithmetic number, because the mean of its divisors is an integer number (82935600).

Almost surely, 2^315155261 is an apocalyptic number.

It is an amenable number.

315155261 is a deficient number, since it is larger than the sum of its proper divisors (16587139).

315155261 is a wasteful number, since it uses less digits than its factorization.

315155261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16587138.

The product of its digits is 4500, while the sum is 29.

The square root of 315155261 is about 17752.6127936144. The cubic root of 315155261 is about 680.5209826671.

The spelling of 315155261 in words is "three hundred fifteen million, one hundred fifty-five thousand, two hundred sixty-one".