31240004031240 has 64 divisors (see below), whose sum is σ = 93720395770560. Its totient is φ = 8330633637120.

The previous prime is 31240004031233. The next prime is 31240004031241. The reversal of 31240004031240 is 4213040004213.

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 31240004031240.

It is not an unprimeable number, because it can be changed into a prime (31240004031241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45155535 + ... + 45842145.

It is an arithmetic number, because the mean of its divisors is an integer number (1464381183915).

Almost surely, 2^{31240004031240} is an apocalyptic number.

31240004031240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31240004031240 is an abundant number, since it is smaller than the sum of its proper divisors (62480391739320).

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

31240004031240 is a wasteful number, since it uses less digits than its factorization.

31240004031240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065782 (or 1065778 counting only the distinct ones).

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

Adding to 31240004031240 its reverse (4213040004213), we get a palindrome (35453044035453).

The spelling of 31240004031240 in words is "thirty-one trillion, two hundred forty billion, four million, thirty-one thousand, two hundred forty".