31044221031 has 4 divisors (see below), whose sum is σ = 41392294712. Its totient is φ = 20696147352.

The previous prime is 31044220967. The next prime is 31044221053. The reversal of 31044221031 is 13012244013.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31044221031 - 2⁶ = 31044220967 is a prime.

It is a super-2 number, since 2×31044221031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31044220989 and 31044221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31044221081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5174036836 + ... + 5174036841.

It is an arithmetic number, because the mean of its divisors is an integer number (10348073678).

Almost surely, 2^31044221031 is an apocalyptic number.

31044221031 is a deficient number, since it is larger than the sum of its proper divisors (10348073681).

31044221031 is a wasteful number, since it uses less digits than its factorization.

31044221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10348073680.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31044221031 its reverse (13012244013), we get a palindrome (44056465044).

The spelling of 31044221031 in words is "thirty-one billion, forty-four million, two hundred twenty-one thousand, thirty-one".