231550025 has 12 divisors (see below), whose sum is σ = 328139712. Its totient is φ = 158777040.

The previous prime is 231550021. The next prime is 231550031. The reversal of 231550025 is 520055132.

231550025 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 231550025 - 2² = 231550021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231550021) 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, 661397 + ... + 661746.

It is an arithmetic number, because the mean of its divisors is an integer number (27344976).

Almost surely, 2^231550025 is an apocalyptic number.

231550025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231550025 is a deficient number, since it is larger than the sum of its proper divisors (96589687).

231550025 is a wasteful number, since it uses less digits than its factorization.

231550025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323160 (or 1323155 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 231550025 is about 15216.7678894041. The cubic root of 231550025 is about 614.0658477481.

The spelling of 231550025 in words is "two hundred thirty-one million, five hundred fifty thousand, twenty-five".