31322013144304 has 160 divisors (see below), whose sum is σ = 67150604943360. Its totient is φ = 14101647436800.

The previous prime is 31322013144287. The next prime is 31322013144347. The reversal of 31322013144304 is 40344131022313.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2730533289 + ... + 2730544759.

It is an arithmetic number, because the mean of its divisors is an integer number (419691280896).

Almost surely, 2^{31322013144304} 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 31322013144304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33575302471680).

31322013144304 is an abundant number, since it is smaller than the sum of its proper divisors (35828591799056).

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

31322013144304 is a wasteful number, since it uses less digits than its factorization.

31322013144304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18039 (or 18033 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 31322013144304 its reverse (40344131022313), we get a palindrome (71666144166617).

The spelling of 31322013144304 in words is "thirty-one trillion, three hundred twenty-two billion, thirteen million, one hundred forty-four thousand, three hundred four".