31031020100 has 36 divisors (see below), whose sum is σ = 67709382468. Its totient is φ = 12343824000.

The previous prime is 31031020099. The next prime is 31031020129. The reversal of 31031020100 is 102013013.

It can be written as a sum of positive squares in 6 ways, for example, as 2142578944 + 28888441156 = 46288^2 + 169966^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 839111 + ... + 875310.

Almost surely, 2^31031020100 is an apocalyptic number.

It is an amenable number.

31031020100 is an abundant number, since it is smaller than the sum of its proper divisors (36678362368).

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

31031020100 is a wasteful number, since it uses less digits than its factorization.

31031020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714616 (or 1714609 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 31031020100 its reverse (102013013), we get a palindrome (31133033113).

The spelling of 31031020100 in words is "thirty-one billion, thirty-one million, twenty thousand, one hundred".