31041100240 has 20 divisors (see below), whose sum is σ = 72170558244. Its totient is φ = 12416440064.

The previous prime is 31041100213. The next prime is 31041100247. The reversal of 31041100240 is 4200114013.

It can be written as a sum of positive squares in 2 ways, for example, as 23508248976 + 7532851264 = 153324^2 + 86792^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31041100247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194006797 + ... + 194006956.

Almost surely, 2^31041100240 is an apocalyptic number.

It is an amenable number.

31041100240 is an abundant number, since it is smaller than the sum of its proper divisors (41129458004).

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

31041100240 is a wasteful number, since it uses less digits than its factorization.

31041100240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388013766 (or 388013760 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31041100240 its reverse (4200114013), we get a palindrome (35241214253).

The spelling of 31041100240 in words is "thirty-one billion, forty-one million, one hundred thousand, two hundred forty".