31042223421431 has 2 divisors, whose sum is σ = 31042223421432. Its totient is φ = 31042223421430.

The previous prime is 31042223421359. The next prime is 31042223421481. The reversal of 31042223421431 is 13412432224013.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31042223421431 - 2²² = 31042219227127 is a prime.

It is a super-2 number, since 2×31042223421431² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31042223421481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15521111710715 + 15521111710716.

It is an arithmetic number, because the mean of its divisors is an integer number (15521111710716).

Almost surely, 2^{31042223421431} is an apocalyptic number.

31042223421431 is a deficient number, since it is larger than the sum of its proper divisors (1).

31042223421431 is an equidigital number, since it uses as much as digits as its factorization.

31042223421431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 31042223421431 its reverse (13412432224013), we get a palindrome (44454655645444).

The spelling of 31042223421431 in words is "thirty-one trillion, forty-two billion, two hundred twenty-three million, four hundred twenty-one thousand, four hundred thirty-one".