31431214414421 has 16 divisors (see below), whose sum is σ = 32127952824576. Its totient is φ = 30744082830336.

The previous prime is 31431214414399. The next prime is 31431214414441. The reversal of 31431214414421 is 12441441213413.

It is a cyclic number.

It is not a de Polignac number, because 31431214414421 - 2⁶ = 31431214414357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431214414441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2193101 + ... + 8226306.

It is an arithmetic number, because the mean of its divisors is an integer number (2007997051536).

Almost surely, 2^{31431214414421} is an apocalyptic number.

It is an amenable number.

31431214414421 is a deficient number, since it is larger than the sum of its proper divisors (696738410155).

31431214414421 is a wasteful number, since it uses less digits than its factorization.

31431214414421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10419868.

The product of its digits is 36864, while the sum is 35.

Adding to 31431214414421 its reverse (12441441213413), we get a palindrome (43872655627834).

The spelling of 31431214414421 in words is "thirty-one trillion, four hundred thirty-one billion, two hundred fourteen million, four hundred fourteen thousand, four hundred twenty-one".