31481423831 has 64 divisors (see below), whose sum is σ = 39701975040. Its totient is φ = 24554880000.

The previous prime is 31481423801. The next prime is 31481423833. The reversal of 31481423831 is 13832418413.

It is not a de Polignac number, because 31481423831 - 2¹⁰ = 31481422807 is a prime.

It is a super-2 number, since 2×31481423831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31481423833) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29953256 + ... + 29954306.

It is an arithmetic number, because the mean of its divisors is an integer number (620343360).

Almost surely, 2^31481423831 is an apocalyptic number.

31481423831 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31481423831 is a deficient number, since it is larger than the sum of its proper divisors (8220551209).

31481423831 is a wasteful number, since it uses less digits than its factorization.

31481423831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368.

The product of its digits is 55296, while the sum is 38.

The spelling of 31481423831 in words is "thirty-one billion, four hundred eighty-one million, four hundred twenty-three thousand, eight hundred thirty-one".