31030320000 has 160 divisors (see below), whose sum is σ = 102998186280. Its totient is φ = 8274688000.

The previous prime is 31030319951. The next prime is 31030320001. The reversal of 31030320000 is 2303013.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31030320001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 175354 + ... + 304646.

Almost surely, 2^31030320000 is an apocalyptic number.

31030320000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31030320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51499093140).

31030320000 is an abundant number, since it is smaller than the sum of its proper divisors (71967866280).

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

31030320000 is an equidigital number, since it uses as much as digits as its factorization.

31030320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129330 (or 129303 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 12.

Adding to 31030320000 its reverse (2303013), we get a palindrome (31032623013).

The spelling of 31030320000 in words is "thirty-one billion, thirty million, three hundred twenty thousand".