31301222010320 has 20 divisors (see below), whose sum is σ = 72775341174180. Its totient is φ = 12520488804096.

The previous prime is 31301222010293. The next prime is 31301222010389. The reversal of 31301222010320 is 2301022210313.

It can be written as a sum of positive squares in 2 ways, for example, as 3190739077696 + 28110482932624 = 1786264^2 + 5301932^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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

It is a junction number, because it is equal to n+sod(n) for n = 31301222010292 and 31301222010301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195632637485 + ... + 195632637644.

It is an arithmetic number, because the mean of its divisors is an integer number (3638767058709).

Almost surely, 2^{31301222010320} is an apocalyptic number.

It is an amenable number.

31301222010320 is an abundant number, since it is smaller than the sum of its proper divisors (41474119163860).

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

31301222010320 is a wasteful number, since it uses less digits than its factorization.

31301222010320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391265275142 (or 391265275136 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31301222010320 its reverse (2301022210313), we get a palindrome (33602244220633).

The spelling of 31301222010320 in words is "thirty-one trillion, three hundred one billion, two hundred twenty-two million, ten thousand, three hundred twenty".