831530225 has 24 divisors (see below), whose sum is σ = 1070811672. Its totient is φ = 640051200.

The previous prime is 831530213. The next prime is 831530239. The reversal of 831530225 is 522035138.

It can be written as a sum of positive squares in 12 ways, for example, as 687698176 + 143832049 = 26224^2 + 11993^2 .

It is not a de Polignac number, because 831530225 - 2¹⁰ = 831529201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69269 + ... + 80381.

It is an arithmetic number, because the mean of its divisors is an integer number (44617153).

Almost surely, 2^831530225 is an apocalyptic number.

It is an amenable number.

831530225 is a deficient number, since it is larger than the sum of its proper divisors (239281447).

831530225 is a wasteful number, since it uses less digits than its factorization.

831530225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11237 (or 11232 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 831530225 is about 28836.2657950020. The cubic root of 831530225 is about 940.3568228101.

The spelling of 831530225 in words is "eight hundred thirty-one million, five hundred thirty thousand, two hundred twenty-five".