31133130100 has 18 divisors (see below), whose sum is σ = 67558892534. Its totient is φ = 12453252000.

The previous prime is 31133130031. The next prime is 31133130103. The reversal of 31133130100 is 103133113.

It can be written as a sum of positive squares in 3 ways, for example, as 2843235684 + 28289894416 = 53322^2 + 168196^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31133130103) 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, 155665551 + ... + 155665750.

Almost surely, 2^31133130100 is an apocalyptic number.

It is an amenable number.

31133130100 is an abundant number, since it is smaller than the sum of its proper divisors (36425762434).

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

31133130100 is a wasteful number, since it uses less digits than its factorization.

31133130100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311331315 (or 311331308 counting only the distinct ones).

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

Adding to 31133130100 its reverse (103133113), we get a palindrome (31236263213).

The spelling of 31133130100 in words is "thirty-one billion, one hundred thirty-three million, one hundred thirty thousand, one hundred".