231842431 has 4 divisors (see below), whose sum is σ = 232173864. Its totient is φ = 231511000.

The previous prime is 231842423. The next prime is 231842441. The reversal of 231842431 is 134248132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231842431 - 2³ = 231842423 is a prime.

It is a super-2 number, since 2×231842431² = 107501825623979522, which contains 22 as substring.

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 231842431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231842441) 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 3 ways as a sum of consecutive naturals, for example, 164665 + ... + 166066.

It is an arithmetic number, because the mean of its divisors is an integer number (58043466).

Almost surely, 2^231842431 is an apocalyptic number.

231842431 is a deficient number, since it is larger than the sum of its proper divisors (331433).

231842431 is an equidigital number, since it uses as much as digits as its factorization.

231842431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331432.

The product of its digits is 4608, while the sum is 28.

The square root of 231842431 is about 15226.3728773467. The cubic root of 231842431 is about 614.3242238934.

The spelling of 231842431 in words is "two hundred thirty-one million, eight hundred forty-two thousand, four hundred thirty-one".