825644331 has 24 divisors (see below), whose sum is σ = 1206822240. Its totient is φ = 543895296.

The previous prime is 825644327. The next prime is 825644353. The reversal of 825644331 is 133446528.

825644331 is a `hidden beast` number, since 8 + 2 + 5 + 644 + 3 + 3 + 1 = 666.

825644331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 825644331 - 2² = 825644327 is a prime.

It is a super-2 number, since 2×825644331² = 1363377122624875122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (825644311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 394570 + ... + 396656.

It is an arithmetic number, because the mean of its divisors is an integer number (50284260).

Almost surely, 2^825644331 is an apocalyptic number.

825644331 is a deficient number, since it is larger than the sum of its proper divisors (381177909).

825644331 is a wasteful number, since it uses less digits than its factorization.

825644331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595 (or 2592 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 825644331 is about 28734.0274065436. The cubic root of 825644331 is about 938.1328301183.

The spelling of 825644331 in words is "eight hundred twenty-five million, six hundred forty-four thousand, three hundred thirty-one".