231530425 has 24 divisors (see below), whose sum is σ = 329084096. Its totient is φ = 158293440.

The previous prime is 231530399. The next prime is 231530459. The reversal of 231530425 is 524035132.

It is not a de Polignac number, because 231530425 - 2⁷ = 231530297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231530425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63502 + ... + 67048.

Almost surely, 2^231530425 is an apocalyptic number.

231530425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231530425 is a deficient number, since it is larger than the sum of its proper divisors (97553671).

231530425 is a wasteful number, since it uses less digits than its factorization.

231530425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937 (or 3932 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 231530425 is about 15216.1238493908. The cubic root of 231530425 is about 614.0485209952.

Adding to 231530425 its reverse (524035132), we get a palindrome (755565557).

The spelling of 231530425 in words is "two hundred thirty-one million, five hundred thirty thousand, four hundred twenty-five".