31231312001003 has 16 divisors (see below), whose sum is σ = 33139659180096. Its totient is φ = 29330896481280.

The previous prime is 31231312000979. The next prime is 31231312001023. The reversal of 31231312001003 is 30010021313213.

It is a de Polignac number, because none of the positive numbers 2^k-31231312001003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231312001023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52042325 + ... + 52639017.

It is an arithmetic number, because the mean of its divisors is an integer number (2071228698756).

Almost surely, 2^{31231312001003} is an apocalyptic number.

31231312001003 is a deficient number, since it is larger than the sum of its proper divisors (1908347179093).

31231312001003 is a wasteful number, since it uses less digits than its factorization.

31231312001003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603334.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31231312001003 its reverse (30010021313213), we get a palindrome (61241333314216).

The spelling of 31231312001003 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twelve million, one thousand, three".