31231020401300 has 18 divisors (see below), whose sum is σ = 67771314271038. Its totient is φ = 12492408160480.

The previous prime is 31231020401297. The next prime is 31231020401303. The reversal of 31231020401300 is 310402013213.

It is an interprime number because it is at equal distance from previous prime (31231020401297) and next prime (31231020401303).

It can be written as a sum of positive squares in 3 ways, for example, as 6193866607504 + 25037153793796 = 2488748^2 + 5003714^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231020401303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156155101907 + ... + 156155102106.

Almost surely, 2^{31231020401300} is an apocalyptic number.

It is an amenable number.

31231020401300 is an abundant number, since it is smaller than the sum of its proper divisors (36540293869738).

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

31231020401300 is a wasteful number, since it uses less digits than its factorization.

31231020401300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312310204027 (or 312310204020 counting only the distinct ones).

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

Adding to 31231020401300 its reverse (310402013213), we get a palindrome (31541422414513).

The spelling of 31231020401300 in words is "thirty-one trillion, two hundred thirty-one billion, twenty million, four hundred one thousand, three hundred".