31200421323 has 4 divisors (see below), whose sum is σ = 41600561768. Its totient is φ = 20800280880.

The previous prime is 31200421321. The next prime is 31200421327. The reversal of 31200421323 is 32312400213.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31200421323 - 2¹ = 31200421321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31200421323.

It is not an unprimeable number, because it can be changed into a prime (31200421321) 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, 5200070218 + ... + 5200070223.

It is an arithmetic number, because the mean of its divisors is an integer number (10400140442).

Almost surely, 2^31200421323 is an apocalyptic number.

31200421323 is a deficient number, since it is larger than the sum of its proper divisors (10400140445).

31200421323 is a wasteful number, since it uses less digits than its factorization.

31200421323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10400140444.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31200421323 its reverse (32312400213), we get a palindrome (63512821536).

The spelling of 31200421323 in words is "thirty-one billion, two hundred million, four hundred twenty-one thousand, three hundred twenty-three".