315211625 has 8 divisors (see below), whose sum is σ = 393384264. Its totient is φ = 252169200.

The previous prime is 315211537. The next prime is 315211679. The reversal of 315211625 is 526112513.

It can be written as a sum of positive squares in 4 ways, for example, as 3759721 + 311451904 = 1939^2 + 17648^2 .

It is a de Polignac number, because none of the positive numbers 2^k-315211625 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 315211594 and 315211603.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1260722 + ... + 1260971.

It is an arithmetic number, because the mean of its divisors is an integer number (49173033).

Almost surely, 2^315211625 is an apocalyptic number.

It is an amenable number.

315211625 is a deficient number, since it is larger than the sum of its proper divisors (78172639).

315211625 is an equidigital number, since it uses as much as digits as its factorization.

315211625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521708 (or 2521698 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 315211625 is about 17754.2002072749. The cubic root of 315211625 is about 680.5615495485.

The spelling of 315211625 in words is "three hundred fifteen million, two hundred eleven thousand, six hundred twenty-five".