231450431 has 2 divisors, whose sum is σ = 231450432. Its totient is φ = 231450430.

The previous prime is 231450391. The next prime is 231450437. The reversal of 231450431 is 134054132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231450431 is a prime.

It is a super-2 number, since 2×231450431² = 107138604020171522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 231450397 and 231450406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231450437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115725215 + 115725216.

It is an arithmetic number, because the mean of its divisors is an integer number (115725216).

Almost surely, 2^231450431 is an apocalyptic number.

231450431 is a deficient number, since it is larger than the sum of its proper divisors (1).

231450431 is an equidigital number, since it uses as much as digits as its factorization.

231450431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 231450431 is about 15213.4950290852. The cubic root of 231450431 is about 613.9777947173.

The spelling of 231450431 in words is "two hundred thirty-one million, four hundred fifty thousand, four hundred thirty-one".