231149421 has 12 divisors (see below), whose sum is σ = 351455520. Its totient is φ = 145989000.

The previous prime is 231149393. The next prime is 231149437. The reversal of 231149421 is 124941132.

It is a happy number.

231149421 is a `hidden beast` number, since 231 + 1 + 4 + 9 + 421 = 666.

It is not a de Polignac number, because 231149421 - 2⁷ = 231149293 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231149461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 675705 + ... + 676046.

It is an arithmetic number, because the mean of its divisors is an integer number (29287960).

Almost surely, 2^231149421 is an apocalyptic number.

It is an amenable number.

231149421 is a deficient number, since it is larger than the sum of its proper divisors (120306099).

231149421 is a wasteful number, since it uses less digits than its factorization.

231149421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351776 (or 1351773 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 231149421 is about 15203.5989489331. The cubic root of 231149421 is about 613.7115121674.

The spelling of 231149421 in words is "two hundred thirty-one million, one hundred forty-nine thousand, four hundred twenty-one".