31061300000 has 144 divisors (see below), whose sum is σ = 76729089024. Its totient is φ = 12376800000.

The previous prime is 31061299999. The next prime is 31061300071. The reversal of 31061300000 is 316013.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38299595 + ... + 38300405.

It is an arithmetic number, because the mean of its divisors is an integer number (532840896).

Almost surely, 2^31061300000 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 31061300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38364544512).

31061300000 is an abundant number, since it is smaller than the sum of its proper divisors (45667789024).

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

31061300000 is an frugal number, since it uses more digits than its factorization.

31061300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1201 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31061300000 its reverse (316013), we get a palindrome (31061616013).

The spelling of 31061300000 in words is "thirty-one billion, sixty-one million, three hundred thousand".