825663231 has 12 divisors (see below), whose sum is σ = 1193276760. Its totient is φ = 550141200.

The previous prime is 825663229. The next prime is 825663233. The reversal of 825663231 is 132366528.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (825663229) and next prime (825663233).

It is not a de Polignac number, because 825663231 - 2¹ = 825663229 is a prime.

It is a super-2 number, since 2×825663231² = 1363439542050718722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825663233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7021 + ... + 41238.

It is an arithmetic number, because the mean of its divisors is an integer number (99439730).

Almost surely, 2^825663231 is an apocalyptic number.

825663231 is a deficient number, since it is larger than the sum of its proper divisors (367613529).

825663231 is a wasteful number, since it uses less digits than its factorization.

825663231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50166 (or 50163 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 825663231 is about 28734.3562830282. The cubic root of 825663231 is about 938.1399883964.

The spelling of 825663231 in words is "eight hundred twenty-five million, six hundred sixty-three thousand, two hundred thirty-one".