31422512321 has 4 divisors (see below), whose sum is σ = 31563420672. Its totient is φ = 31281603972.

The previous prime is 31422512267. The next prime is 31422512357. The reversal of 31422512321 is 12321522413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31422512321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31422511321) 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 3 ways as a sum of consecutive naturals, for example, 70453841 + ... + 70454286.

It is an arithmetic number, because the mean of its divisors is an integer number (7890855168).

Almost surely, 2^31422512321 is an apocalyptic number.

It is an amenable number.

31422512321 is a deficient number, since it is larger than the sum of its proper divisors (140908351).

31422512321 is a wasteful number, since it uses less digits than its factorization.

31422512321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140908350.

The product of its digits is 2880, while the sum is 26.

The spelling of 31422512321 in words is "thirty-one billion, four hundred twenty-two million, five hundred twelve thousand, three hundred twenty-one".