31424304044021 has 48 divisors (see below), whose sum is σ = 39431381385600. Its totient is φ = 24891294460032.

The previous prime is 31424304043999. The next prime is 31424304044047. The reversal of 31424304044021 is 12044040342413.

It is not a de Polignac number, because 31424304044021 - 2³⁸ = 31149426137077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31424304044071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6695720 + ... + 10376958.

It is an arithmetic number, because the mean of its divisors is an integer number (821487112200).

Almost surely, 2^{31424304044021} is an apocalyptic number.

It is an amenable number.

31424304044021 is a deficient number, since it is larger than the sum of its proper divisors (8007077341579).

31424304044021 is a wasteful number, since it uses less digits than its factorization.

31424304044021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3681498 (or 3681491 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 31424304044021 its reverse (12044040342413), we get a palindrome (43468344386434).

The spelling of 31424304044021 in words is "thirty-one trillion, four hundred twenty-four billion, three hundred four million, forty-four thousand, twenty-one".