315061621 has 10 divisors (see below), whose sum is σ = 367552822. Its totient is φ = 270050760.

The previous prime is 315061601. The next prime is 315061657. The reversal of 315061621 is 126160513.

It can be written as a sum of positive squares in only one way, i.e., 312900721 + 2160900 = 17689^2 + 1470^2 .

It is not a de Polignac number, because 315061621 - 2¹⁷ = 314930549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315061601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 63210 + ... + 68011.

Almost surely, 2^315061621 is an apocalyptic number.

It is an amenable number.

315061621 is a deficient number, since it is larger than the sum of its proper divisors (52491201).

315061621 is an frugal number, since it uses more digits than its factorization.

315061621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131249 (or 131228 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 315061621 is about 17749.9752394193. The cubic root of 315061621 is about 680.4535764232.

The spelling of 315061621 in words is "three hundred fifteen million, sixty-one thousand, six hundred twenty-one".