31123304100240 has 80 divisors (see below), whose sum is σ = 105253355693376. Its totient is φ = 7545043417600.

The previous prime is 31123304100143. The next prime is 31123304100281. The reversal of 31123304100240 is 4200140332113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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 31123304100240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5894562531 + ... + 5894567810.

Almost surely, 2^{31123304100240} is an apocalyptic number.

31123304100240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31123304100240 is an abundant number, since it is smaller than the sum of its proper divisors (74130051593136).

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

31123304100240 is a wasteful number, since it uses less digits than its factorization.

31123304100240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11789130368 (or 11789130362 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31123304100240 its reverse (4200140332113), we get a palindrome (35323444432353).

The spelling of 31123304100240 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred four million, one hundred thousand, two hundred forty".