231424432431 has 4 divisors (see below), whose sum is σ = 308565909912. Its totient is φ = 154282954952.

The previous prime is 231424432423. The next prime is 231424432457. The reversal of 231424432431 is 134234424132.

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 231424432431 - 2³ = 231424432423 is a prime.

It is a super-2 number, since 2×231424432431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231424432392 and 231424432401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231424432231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38570738736 + ... + 38570738741.

It is an arithmetic number, because the mean of its divisors is an integer number (77141477478).

Almost surely, 2^231424432431 is an apocalyptic number.

231424432431 is a deficient number, since it is larger than the sum of its proper divisors (77141477481).

231424432431 is an equidigital number, since it uses as much as digits as its factorization.

231424432431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77141477480.

The product of its digits is 55296, while the sum is 33.

Adding to 231424432431 its reverse (134234424132), we get a palindrome (365658856563).

The spelling of 231424432431 in words is "two hundred thirty-one billion, four hundred twenty-four million, four hundred thirty-two thousand, four hundred thirty-one".