31013008421 has 8 divisors (see below), whose sum is σ = 33535969920. Its totient is φ = 28567676608.

The previous prime is 31013008409. The next prime is 31013008427. The reversal of 31013008421 is 12480031013.

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

It is a cyclic number.

It is not a de Polignac number, because 31013008421 - 2¹⁰ = 31013007397 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 (31013008427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19406591 + ... + 19408188.

It is an arithmetic number, because the mean of its divisors is an integer number (4191996240).

Almost surely, 2^31013008421 is an apocalyptic number.

It is an amenable number.

31013008421 is a deficient number, since it is larger than the sum of its proper divisors (2522961499).

31013008421 is a wasteful number, since it uses less digits than its factorization.

31013008421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38814843.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 31013008421 its reverse (12480031013), we get a palindrome (43493039434).

The spelling of 31013008421 in words is "thirty-one billion, thirteen million, eight thousand, four hundred twenty-one".