831256025 has 12 divisors (see below), whose sum is σ = 1031842812. Its totient is φ = 664304640.

The previous prime is 831256007. The next prime is 831256051. The reversal of 831256025 is 520652138.

It can be written as a sum of positive squares in 6 ways, for example, as 42994249 + 788261776 = 6557^2 + 28076^2 .

It is not a de Polignac number, because 831256025 - 2⁶ = 831255961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 831255982 and 831256000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7409 + ... + 41441.

It is an arithmetic number, because the mean of its divisors is an integer number (85986901).

Almost surely, 2^831256025 is an apocalyptic number.

It is an amenable number.

831256025 is a deficient number, since it is larger than the sum of its proper divisors (200586787).

831256025 is a wasteful number, since it uses less digits than its factorization.

831256025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35020 (or 35015 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 831256025 is about 28831.5109732390. The cubic root of 831256025 is about 940.2534494630.

The spelling of 831256025 in words is "eight hundred thirty-one million, two hundred fifty-six thousand, twenty-five".