31214334320 has 80 divisors (see below), whose sum is σ = 78771624960. Its totient is φ = 11434493952.

The previous prime is 31214334313. The next prime is 31214334323. The reversal of 31214334320 is 2343341213.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 31214334320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31214334323) 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, 13916 + ... + 250244.

It is an arithmetic number, because the mean of its divisors is an integer number (984645312).

Almost surely, 2^31214334320 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 31214334320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39385812480).

31214334320 is an abundant number, since it is smaller than the sum of its proper divisors (47557290640).

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

31214334320 is a wasteful number, since it uses less digits than its factorization.

31214334320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236482 (or 236476 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 31214334320 its reverse (2343341213), we get a palindrome (33557675533).

The spelling of 31214334320 in words is "thirty-one billion, two hundred fourteen million, three hundred thirty-four thousand, three hundred twenty".