231132438 has 12 divisors (see below), whose sum is σ = 500786988. Its totient is φ = 77044140.

The previous prime is 231132437. The next prime is 231132443. The reversal of 231132438 is 834231132.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231132431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6420328 + ... + 6420363.

It is an arithmetic number, because the mean of its divisors is an integer number (41732249).

Almost surely, 2^231132438 is an apocalyptic number.

231132438 is an abundant number, since it is smaller than the sum of its proper divisors (269654550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231132438 is a wasteful number, since it uses less digits than its factorization.

231132438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12840699 (or 12840696 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 231132438 is about 15203.0404196003. The cubic root of 231132438 is about 613.6964816043.

The spelling of 231132438 in words is "two hundred thirty-one million, one hundred thirty-two thousand, four hundred thirty-eight".