108431231 has 2 divisors, whose sum is σ = 108431232. Its totient is φ = 108431230.

The previous prime is 108431173. The next prime is 108431237. The reversal of 108431231 is 132134801.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108431231 is a prime.

It is a super-2 number, since 2×108431231² = 23514663712350722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 108431197 and 108431206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108431237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54215615 + 54215616.

It is an arithmetic number, because the mean of its divisors is an integer number (54215616).

Almost surely, 2^108431231 is an apocalyptic number.

108431231 is a deficient number, since it is larger than the sum of its proper divisors (1).

108431231 is an equidigital number, since it uses as much as digits as its factorization.

108431231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 108431231 is about 10413.0317871406. The cubic root of 108431231 is about 476.8533039868.

The spelling of 108431231 in words is "one hundred eight million, four hundred thirty-one thousand, two hundred thirty-one".