31213410203 has 4 divisors (see below), whose sum is σ = 31214066640. Its totient is φ = 31212753768.

The previous prime is 31213410199. The next prime is 31213410211. The reversal of 31213410203 is 30201431213.

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 31213410203 - 2² = 31213410199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213410233) 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, 250808 + ... + 354021.

It is an arithmetic number, because the mean of its divisors is an integer number (7803516660).

Almost surely, 2^31213410203 is an apocalyptic number.

31213410203 is a deficient number, since it is larger than the sum of its proper divisors (656437).

31213410203 is an equidigital number, since it uses as much as digits as its factorization.

31213410203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656436.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31213410203 its reverse (30201431213), we get a palindrome (61414841416).

The spelling of 31213410203 in words is "thirty-one billion, two hundred thirteen million, four hundred ten thousand, two hundred three".