31242404324431 has 2 divisors, whose sum is σ = 31242404324432. Its totient is φ = 31242404324430.

The previous prime is 31242404324401. The next prime is 31242404324501. The reversal of 31242404324431 is 13442340424213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31242404324431 - 2⁵ = 31242404324399 is a prime.

It is a super-2 number, since 2×31242404324431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31242404324401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15621202162215 + 15621202162216.

It is an arithmetic number, because the mean of its divisors is an integer number (15621202162216).

Almost surely, 2^{31242404324431} is an apocalyptic number.

31242404324431 is a deficient number, since it is larger than the sum of its proper divisors (1).

31242404324431 is an equidigital number, since it uses as much as digits as its factorization.

31242404324431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 37.

Adding to 31242404324431 its reverse (13442340424213), we get a palindrome (44684744748644).

The spelling of 31242404324431 in words is "thirty-one trillion, two hundred forty-two billion, four hundred four million, three hundred twenty-four thousand, four hundred thirty-one".