231231025 has 48 divisors (see below), whose sum is σ = 314979840. Its totient is φ = 167731200.

The previous prime is 231231017. The next prime is 231231031. The reversal of 231231025 is 520132132.

It is not a de Polignac number, because 231231025 - 2³ = 231231017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231230993 and 231231011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2383777 + ... + 2383873.

It is an arithmetic number, because the mean of its divisors is an integer number (6562080).

Almost surely, 2^231231025 is an apocalyptic number.

231231025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231231025 is a deficient number, since it is larger than the sum of its proper divisors (83748815).

231231025 is a wasteful number, since it uses less digits than its factorization.

231231025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 231231025 is about 15206.2824187899. The cubic root of 231231025 is about 613.7837243634.

Adding to 231231025 its reverse (520132132), we get a palindrome (751363157).

The spelling of 231231025 in words is "two hundred thirty-one million, two hundred thirty-one thousand, twenty-five".