231003431 has 2 divisors, whose sum is σ = 231003432. Its totient is φ = 231003430.

The previous prime is 231003407. The next prime is 231003457. The reversal of 231003431 is 134300132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231003431 - 2²² = 226809127 is a prime.

It is a super-2 number, since 2×231003431² = 106725170267543522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231003631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115501715 + 115501716.

It is an arithmetic number, because the mean of its divisors is an integer number (115501716).

Almost surely, 2^231003431 is an apocalyptic number.

231003431 is a deficient number, since it is larger than the sum of its proper divisors (1).

231003431 is an equidigital number, since it uses as much as digits as its factorization.

231003431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 231003431 is about 15198.7970247648. The cubic root of 231003431 is about 613.5822817439.

Adding to 231003431 its reverse (134300132), we get a palindrome (365303563).

The spelling of 231003431 in words is "two hundred thirty-one million, three thousand, four hundred thirty-one".