31423444131 has 8 divisors (see below), whose sum is σ = 43342681680. Its totient is φ = 20226584672.

The previous prime is 31423444127. The next prime is 31423444133. The reversal of 31423444131 is 13144432413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31423444131 - 2² = 31423444127 is a prime.

It is a super-2 number, since 2×31423444131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31423444133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180594420 + ... + 180594593.

It is an arithmetic number, because the mean of its divisors is an integer number (5417835210).

Almost surely, 2^31423444131 is an apocalyptic number.

31423444131 is a deficient number, since it is larger than the sum of its proper divisors (11919237549).

31423444131 is a wasteful number, since it uses less digits than its factorization.

31423444131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361189045.

The product of its digits is 13824, while the sum is 30.

Adding to 31423444131 its reverse (13144432413), we get a palindrome (44567876544).

The spelling of 31423444131 in words is "thirty-one billion, four hundred twenty-three million, four hundred forty-four thousand, one hundred thirty-one".