315224521 has 2 divisors, whose sum is σ = 315224522. Its totient is φ = 315224520.

The previous prime is 315224501. The next prime is 315224527. The reversal of 315224521 is 125422513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194993296 + 120231225 = 13964^2 + 10965^2 .

It is a cyclic number.

It is not a de Polignac number, because 315224521 - 2²³ = 306835913 is a prime.

It is not a weakly prime, because it can be changed into another prime (315224527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157612260 + 157612261.

It is an arithmetic number, because the mean of its divisors is an integer number (157612261).

Almost surely, 2^315224521 is an apocalyptic number.

It is an amenable number.

315224521 is a deficient number, since it is larger than the sum of its proper divisors (1).

315224521 is an equidigital number, since it uses as much as digits as its factorization.

315224521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 25.

The square root of 315224521 is about 17754.5633852258. The cubic root of 315224521 is about 680.5708305112.

The spelling of 315224521 in words is "three hundred fifteen million, two hundred twenty-four thousand, five hundred twenty-one".