31245040524140 has 96 divisors (see below), whose sum is σ = 70454692788480. Its totient is φ = 11604298616064.

The previous prime is 31245040524127. The next prime is 31245040524149. The reversal of 31245040524140 is 4142504054213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31245040524140.

It is not an unprimeable number, because it can be changed into a prime (31245040524149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1900847 + ... + 8130393.

It is an arithmetic number, because the mean of its divisors is an integer number (733903049880).

Almost surely, 2^{31245040524140} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31245040524140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35227346394240).

31245040524140 is an abundant number, since it is smaller than the sum of its proper divisors (39209652264340).

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

31245040524140 is a wasteful number, since it uses less digits than its factorization.

31245040524140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6229839 (or 6229837 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 31245040524140 its reverse (4142504054213), we get a palindrome (35387544578353).

The spelling of 31245040524140 in words is "thirty-one trillion, two hundred forty-five billion, forty million, five hundred twenty-four thousand, one hundred forty".