315081293 has 2 divisors, whose sum is σ = 315081294. Its totient is φ = 315081292.

The previous prime is 315081203. The next prime is 315081311. The reversal of 315081293 is 392180513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312511684 + 2569609 = 17678^2 + 1603^2 .

It is a cyclic number.

It is not a de Polignac number, because 315081293 - 2⁸ = 315081037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315081203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157540646 + 157540647.

It is an arithmetic number, because the mean of its divisors is an integer number (157540647).

Almost surely, 2^315081293 is an apocalyptic number.

It is an amenable number.

315081293 is a deficient number, since it is larger than the sum of its proper divisors (1).

315081293 is an equidigital number, since it uses as much as digits as its factorization.

315081293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 315081293 is about 17750.5293723877. The cubic root of 315081293 is about 680.4677383133.

The spelling of 315081293 in words is "three hundred fifteen million, eighty-one thousand, two hundred ninety-three".