31130050205 has 64 divisors (see below), whose sum is σ = 40715136000. Its totient is φ = 22777210368.

The previous prime is 31130050199. The next prime is 31130050207. The reversal of 31130050205 is 50205003113.

It is not a de Polignac number, because 31130050205 - 2⁶ = 31130050141 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130050207) 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, 101400662 + ... + 101400968.

It is an arithmetic number, because the mean of its divisors is an integer number (636174000).

Almost surely, 2^31130050205 is an apocalyptic number.

It is an amenable number.

31130050205 is a deficient number, since it is larger than the sum of its proper divisors (9585085795).

31130050205 is a wasteful number, since it uses less digits than its factorization.

31130050205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its (nonzero) digits is 450, while the sum is 20.

Adding to 31130050205 its reverse (50205003113), we get a palindrome (81335053318).

The spelling of 31130050205 in words is "thirty-one billion, one hundred thirty million, fifty thousand, two hundred five".