231220432 has 10 divisors (see below), whose sum is σ = 447989618. Its totient is φ = 115610208.

The previous prime is 231220421. The next prime is 231220453. The reversal of 231220432 is 234022132.

It can be written as a sum of positive squares in only one way, i.e., 146506816 + 84713616 = 12104^2 + 9204^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7225623 + ... + 7225654.

Almost surely, 2^231220432 is an apocalyptic number.

It is an amenable number.

231220432 is a deficient number, since it is larger than the sum of its proper divisors (216769186).

231220432 is a wasteful number, since it uses less digits than its factorization.

231220432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14451285 (or 14451279 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 231220432 is about 15205.9341048158. The cubic root of 231220432 is about 613.7743514714.

Adding to 231220432 its reverse (234022132), we get a palindrome (465242564).

The spelling of 231220432 in words is "two hundred thirty-one million, two hundred twenty thousand, four hundred thirty-two".