231321025 has 12 divisors (see below), whose sum is σ = 308902972. Its totient is φ = 170821440.

The previous prime is 231321019. The next prime is 231321043. The reversal of 231321025 is 520123132.

It can be written as a sum of positive squares in 6 ways, for example, as 73667889 + 157653136 = 8583^2 + 12556^2 .

It is not a de Polignac number, because 231321025 - 2⁷ = 231320897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231320993 and 231321011.

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, 355554 + ... + 356203.

Almost surely, 2^231321025 is an apocalyptic number.

231321025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231321025 is a deficient number, since it is larger than the sum of its proper divisors (77581947).

231321025 is a wasteful number, since it uses less digits than its factorization.

231321025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711780 (or 711775 counting only the distinct ones).

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

The square root of 231321025 is about 15209.2414340755. The cubic root of 231321025 is about 613.8633465649.

Adding to 231321025 its reverse (520123132), we get a palindrome (751444157).

The spelling of 231321025 in words is "two hundred thirty-one million, three hundred twenty-one thousand, twenty-five".