315157720903 has 2 divisors, whose sum is σ = 315157720904. Its totient is φ = 315157720902.

The previous prime is 315157720859. The next prime is 315157720907. The reversal of 315157720903 is 309027751513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315157720903 - 2³³ = 306567786311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315157720903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315157720907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157578860451 + 157578860452.

It is an arithmetic number, because the mean of its divisors is an integer number (157578860452).

Almost surely, 2^315157720903 is an apocalyptic number.

315157720903 is a deficient number, since it is larger than the sum of its proper divisors (1).

315157720903 is an equidigital number, since it uses as much as digits as its factorization.

315157720903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 198450, while the sum is 43.

The spelling of 315157720903 in words is "three hundred fifteen billion, one hundred fifty-seven million, seven hundred twenty thousand, nine hundred three".