31513340000 has 120 divisors (see below), whose sum is σ = 77841901368. Its totient is φ = 12554240000.

The previous prime is 31513339987. The next prime is 31513340003. The reversal of 31513340000 is 4331513.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31513340003) 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 19 ways as a sum of consecutive naturals, for example, 5136935 + ... + 5143065.

Almost surely, 2^31513340000 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 31513340000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38920950684).

31513340000 is an abundant number, since it is smaller than the sum of its proper divisors (46328561368).

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

31513340000 is an equidigital number, since it uses as much as digits as its factorization.

31513340000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6418 (or 6395 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 31513340000 its reverse (4331513), we get a palindrome (31517671513).

The spelling of 31513340000 in words is "thirty-one billion, five hundred thirteen million, three hundred forty thousand".