431401031 has 2 divisors, whose sum is σ = 431401032. Its totient is φ = 431401030.

The previous prime is 431401021. The next prime is 431401043. The reversal of 431401031 is 130104134.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431401031 is a prime.

It is a super-2 number, since 2×431401031² = 372213699095725922, 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 (431401021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215700515 + 215700516.

It is an arithmetic number, because the mean of its divisors is an integer number (215700516).

Almost surely, 2^431401031 is an apocalyptic number.

431401031 is a deficient number, since it is larger than the sum of its proper divisors (1).

431401031 is an equidigital number, since it uses as much as digits as its factorization.

431401031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 431401031 is about 20770.1957381244. The cubic root of 431401031 is about 755.6030916515.

Adding to 431401031 its reverse (130104134), we get a palindrome (561505165).

The spelling of 431401031 in words is "four hundred thirty-one million, four hundred one thousand, thirty-one".