231866825 has 24 divisors (see below), whose sum is σ = 314265600. Its totient is φ = 168940800.

The previous prime is 231866813. The next prime is 231866857. The reversal of 231866825 is 528668132.

It is not a de Polignac number, because 231866825 - 2¹⁴ = 231850441 is a prime.

It is a congruent 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, 4376 + ... + 21974.

It is an arithmetic number, because the mean of its divisors is an integer number (13094400).

Almost surely, 2^231866825 is an apocalyptic number.

231866825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231866825 is a deficient number, since it is larger than the sum of its proper divisors (82398775).

231866825 is a wasteful number, since it uses less digits than its factorization.

231866825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17657 (or 17652 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 231866825 is about 15227.1739006291. The cubic root of 231866825 is about 614.3457691293.

The spelling of 231866825 in words is "two hundred thirty-one million, eight hundred sixty-six thousand, eight hundred twenty-five".