31133242100 has 18 divisors (see below), whose sum is σ = 67559135574. Its totient is φ = 12453296800.

The previous prime is 31133242093. The next prime is 31133242169. The reversal of 31133242100 is 124233113.

It can be written as a sum of positive squares in 3 ways, for example, as 369485284 + 30763756816 = 19222^2 + 175396^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155666111 + ... + 155666310.

Almost surely, 2^31133242100 is an apocalyptic number.

It is an amenable number.

31133242100 is an abundant number, since it is smaller than the sum of its proper divisors (36425893474).

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

31133242100 is a wasteful number, since it uses less digits than its factorization.

31133242100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311332435 (or 311332428 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31133242100 its reverse (124233113), we get a palindrome (31257475213).

The spelling of 31133242100 in words is "thirty-one billion, one hundred thirty-three million, two hundred forty-two thousand, one hundred".