31314042421 has 4 divisors (see below), whose sum is σ = 31755085344. Its totient is φ = 30872999500.

The previous prime is 31314042317. The next prime is 31314042511. The reversal of 31314042421 is 12424041313.

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 not a de Polignac number, because 31314042421 - 2²⁷ = 31179824693 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 (31314042821) 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, 220521355 + ... + 220521496.

It is an arithmetic number, because the mean of its divisors is an integer number (7938771336).

Almost surely, 2^31314042421 is an apocalyptic number.

It is an amenable number.

31314042421 is a deficient number, since it is larger than the sum of its proper divisors (441042923).

31314042421 is an equidigital number, since it uses as much as digits as its factorization.

31314042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441042922.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31314042421 its reverse (12424041313), we get a palindrome (43738083734).

The spelling of 31314042421 in words is "thirty-one billion, three hundred fourteen million, forty-two thousand, four hundred twenty-one".