31231320023003 has 4 divisors (see below), whose sum is σ = 32589203502288. Its totient is φ = 29873436543720.

The previous prime is 31231320022949. The next prime is 31231320023009. The reversal of 31231320023003 is 30032002313213.

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

It is a cyclic number.

It is not a de Polignac number, because 31231320023003 - 2¹⁴ = 31231320006619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1357883479261 = 31231320023003 / (3 + 1 + 2 + 3 + 1 + 3 + 2 + 0 + 0 + 2 + 3 + 0 + 0 + 3).

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 31231320023003.

It is not an unprimeable number, because it can be changed into a prime (31231320023009) 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, 678941739608 + ... + 678941739653.

It is an arithmetic number, because the mean of its divisors is an integer number (8147300875572).

Almost surely, 2^{31231320023003} is an apocalyptic number.

31231320023003 is a deficient number, since it is larger than the sum of its proper divisors (1357883479285).

31231320023003 is a wasteful number, since it uses less digits than its factorization.

31231320023003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357883479284.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31231320023003 its reverse (30032002313213), we get a palindrome (61263322336216).

The spelling of 31231320023003 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty million, twenty-three thousand, three".