315344261 has 2 divisors, whose sum is σ = 315344262. Its totient is φ = 315344260.

The previous prime is 315344257. The next prime is 315344389. The reversal of 315344261 is 162443513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287980900 + 27363361 = 16970^2 + 5231^2 .

It is a cyclic number.

It is not a de Polignac number, because 315344261 - 2² = 315344257 is a prime.

It is a super-2 number, since 2×315344261² = 198884005891272242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315344251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157672130 + 157672131.

It is an arithmetic number, because the mean of its divisors is an integer number (157672131).

Almost surely, 2^315344261 is an apocalyptic number.

It is an amenable number.

315344261 is a deficient number, since it is larger than the sum of its proper divisors (1).

315344261 is an equidigital number, since it uses as much as digits as its factorization.

315344261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 315344261 is about 17757.9351558676. The cubic root of 315344261 is about 680.6569926270.

Adding to 315344261 its reverse (162443513), we get a palindrome (477787774).

The spelling of 315344261 in words is "three hundred fifteen million, three hundred forty-four thousand, two hundred sixty-one".