31312421331 has 8 divisors (see below), whose sum is σ = 41750818704. Its totient is φ = 20874485760.

The previous prime is 31312421323. The next prime is 31312421353. The reversal of 31312421331 is 13312421313.

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

It is not a de Polignac number, because 31312421331 - 2³ = 31312421323 is a prime.

It is a super-2 number, since 2×31312421331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31312421831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100435 + ... + 269651.

It is an arithmetic number, because the mean of its divisors is an integer number (5218852338).

Almost surely, 2^31312421331 is an apocalyptic number.

31312421331 is a deficient number, since it is larger than the sum of its proper divisors (10438397373).

31312421331 is a wasteful number, since it uses less digits than its factorization.

31312421331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230901.

The product of its digits is 1296, while the sum is 24.

Adding to 31312421331 its reverse (13312421313), we get a palindrome (44624842644).

The spelling of 31312421331 in words is "thirty-one billion, three hundred twelve million, four hundred twenty-one thousand, three hundred thirty-one".