31243045003 has 4 divisors (see below), whose sum is σ = 32601438288. Its totient is φ = 29884651720.

The previous prime is 31243044983. The next prime is 31243045027. The reversal of 31243045003 is 30054034213.

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 31243045003 - 2⁹ = 31243044491 is a prime.

It is a super-2 number, since 2×31243045003² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31243049003) 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, 679196608 + ... + 679196653.

It is an arithmetic number, because the mean of its divisors is an integer number (8150359572).

Almost surely, 2^31243045003 is an apocalyptic number.

31243045003 is a deficient number, since it is larger than the sum of its proper divisors (1358393285).

31243045003 is a wasteful number, since it uses less digits than its factorization.

31243045003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358393284.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 31243045003 its reverse (30054034213), we get a palindrome (61297079216).

The spelling of 31243045003 in words is "thirty-one billion, two hundred forty-three million, forty-five thousand, three".