31223443422431 has 16 divisors (see below), whose sum is σ = 34103023077984. Its totient is φ = 28412514975744.

The previous prime is 31223443422407. The next prime is 31223443422463. The reversal of 31223443422431 is 13422434432213.

It is a cyclic number.

It is not a de Polignac number, because 31223443422431 - 2¹⁰ = 31223443421407 is a prime.

It is a super-2 number, since 2×31223443422431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223443422491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6393506 + ... + 10164831.

It is an arithmetic number, because the mean of its divisors is an integer number (2131438942374).

Almost surely, 2^{31223443422431} is an apocalyptic number.

31223443422431 is a deficient number, since it is larger than the sum of its proper divisors (2879579655553).

31223443422431 is a wasteful number, since it uses less digits than its factorization.

31223443422431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16560410.

The product of its digits is 331776, while the sum is 38.

Adding to 31223443422431 its reverse (13422434432213), we get a palindrome (44645877854644).

The spelling of 31223443422431 in words is "thirty-one trillion, two hundred twenty-three billion, four hundred forty-three million, four hundred twenty-two thousand, four hundred thirty-one".