315520523 has 2 divisors, whose sum is σ = 315520524. Its totient is φ = 315520522.

The previous prime is 315520489. The next prime is 315520529. The reversal of 315520523 is 325025513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315520523 - 2¹⁶ = 315454987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 315520492 and 315520501.

It is not a weakly prime, because it can be changed into another prime (315520529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157760261 + 157760262.

It is an arithmetic number, because the mean of its divisors is an integer number (157760262).

Almost surely, 2^315520523 is an apocalyptic number.

315520523 is a deficient number, since it is larger than the sum of its proper divisors (1).

315520523 is an equidigital number, since it uses as much as digits as its factorization.

315520523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 315520523 is about 17762.8973706431. The cubic root of 315520523 is about 680.7837869821.

The spelling of 315520523 in words is "three hundred fifteen million, five hundred twenty thousand, five hundred twenty-three".