31000123203 has 64 divisors (see below), whose sum is σ = 51392517120. Its totient is φ = 16219717632.

The previous prime is 31000123177. The next prime is 31000123207. The reversal of 31000123203 is 30232100013.

It is not a de Polignac number, because 31000123203 - 2⁸ = 31000122947 is a prime.

It is a super-2 number, since 2×31000123203² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31000123207) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2035525 + ... + 2050697.

It is an arithmetic number, because the mean of its divisors is an integer number (803008080).

Almost surely, 2^31000123203 is an apocalyptic number.

31000123203 is a deficient number, since it is larger than the sum of its proper divisors (20392393917).

31000123203 is a wasteful number, since it uses less digits than its factorization.

31000123203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15356.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31000123203 its reverse (30232100013), we get a palindrome (61232223216).

The spelling of 31000123203 in words is "thirty-one billion, one hundred twenty-three thousand, two hundred three".