31042403100240 has 160 divisors (see below), whose sum is σ = 110500027355136. Its totient is φ = 7061778823680.

The previous prime is 31042403100239. The next prime is 31042403100257. The reversal of 31042403100240 is 4200130424013.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 31042403100240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43431352 + ... + 44140311.

Almost surely, 2^{31042403100240} is an apocalyptic number.

31042403100240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31042403100240 is an abundant number, since it is smaller than the sum of its proper divisors (79457624254896).

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

31042403100240 is a wasteful number, since it uses less digits than its factorization.

31042403100240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87571897 (or 87571891 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31042403100240 its reverse (4200130424013), we get a palindrome (35242533524253).

The spelling of 31042403100240 in words is "thirty-one trillion, forty-two billion, four hundred three million, one hundred thousand, two hundred forty".