31000131100 has 36 divisors (see below), whose sum is σ = 67408522384. Its totient is φ = 12374570880.

The previous prime is 31000131089. The next prime is 31000131103. The reversal of 31000131100 is 113100013.

It is a super-2 number, since 2×31000131100² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000131103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269577 + ... + 366976.

Almost surely, 2^31000131100 is an apocalyptic number.

It is an amenable number.

31000131100 is an abundant number, since it is smaller than the sum of its proper divisors (36408391284).

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

31000131100 is a wasteful number, since it uses less digits than its factorization.

31000131100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637054 (or 637047 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 10.

Adding to 31000131100 its reverse (113100013), we get a palindrome (31113231113).

The spelling of 31000131100 in words is "thirty-one billion, one hundred thirty-one thousand, one hundred".