31130313100 has 18 divisors (see below), whose sum is σ = 67552779644. Its totient is φ = 12452125200.

The previous prime is 31130313091. The next prime is 31130313107. The reversal of 31130313100 is 131303113.

It is a super-2 number, since 2×31130313100² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31130313107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155651466 + ... + 155651665.

Almost surely, 2^31130313100 is an apocalyptic number.

It is an amenable number.

31130313100 is an abundant number, since it is smaller than the sum of its proper divisors (36422466544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31130313100 is a wasteful number, since it uses less digits than its factorization.

31130313100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311303145 (or 311303138 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 16.

Adding to 31130313100 its reverse (131303113), we get a palindrome (31261616213).

The spelling of 31130313100 in words is "thirty-one billion, one hundred thirty million, three hundred thirteen thousand, one hundred".