231032225 has 24 divisors (see below), whose sum is σ = 294659712. Its totient is φ = 179625600.

The previous prime is 231032209. The next prime is 231032233. The reversal of 231032225 is 522230132.

It is not a de Polignac number, because 231032225 - 2⁴ = 231032209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231032197 and 231032206.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 128684 + ... + 130466.

It is an arithmetic number, because the mean of its divisors is an integer number (12277488).

Almost surely, 2^231032225 is an apocalyptic number.

231032225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231032225 is a deficient number, since it is larger than the sum of its proper divisors (63627487).

231032225 is a wasteful number, since it uses less digits than its factorization.

231032225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 231032225 is about 15199.7442412693. The cubic root of 231032225 is about 613.6077745171.

Adding to 231032225 its reverse (522230132), we get a palindrome (753262357).

The spelling of 231032225 in words is "two hundred thirty-one million, thirty-two thousand, two hundred twenty-five".