31240342100 has 36 divisors (see below), whose sum is σ = 73954412448. Its totient is φ = 11360124000.

The previous prime is 31240342099. The next prime is 31240342141. The reversal of 31240342100 is 124304213.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14199056 + ... + 14201255.

Almost surely, 2^31240342100 is an apocalyptic number.

It is an amenable number.

31240342100 is an abundant number, since it is smaller than the sum of its proper divisors (42714070348).

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

31240342100 is a wasteful number, since it uses less digits than its factorization.

31240342100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28400336 (or 28400329 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31240342100 its reverse (124304213), we get a palindrome (31364646313).

The spelling of 31240342100 in words is "thirty-one billion, two hundred forty million, three hundred forty-two thousand, one hundred".