231135025 has 12 divisors (see below), whose sum is σ = 312663024. Its totient is φ = 168098000.

The previous prime is 231135013. The next prime is 231135031. The reversal of 231135025 is 520531132.

It is not a de Polignac number, because 231135025 - 2⁵ = 231134993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231134987 and 231135005.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 419971 + ... + 420520.

It is an arithmetic number, because the mean of its divisors is an integer number (26055252).

Almost surely, 2^231135025 is an apocalyptic number.

231135025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231135025 is a deficient number, since it is larger than the sum of its proper divisors (81527999).

231135025 is a wasteful number, since it uses less digits than its factorization.

231135025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840512 (or 840507 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 231135025 is about 15203.1255010277. The cubic root of 231135025 is about 613.6987712394.

Adding to 231135025 its reverse (520531132), we get a palindrome (751666157).

The spelling of 231135025 in words is "two hundred thirty-one million, one hundred thirty-five thousand, twenty-five".