31231120023404 has 72 divisors (see below), whose sum is σ = 63809533892160. Its totient is φ = 13335953836800.

The previous prime is 31231120023371. The next prime is 31231120023407. The reversal of 31231120023404 is 40432002113213.

It is not an unprimeable number, because it can be changed into a prime (31231120023407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 948998102 + ... + 949031010.

It is an arithmetic number, because the mean of its divisors is an integer number (886243526280).

Almost surely, 2^{31231120023404} 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 31231120023404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31904766946080).

31231120023404 is an abundant number, since it is smaller than the sum of its proper divisors (32578413868756).

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

31231120023404 is a wasteful number, since it uses less digits than its factorization.

31231120023404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50439 (or 50430 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31231120023404 its reverse (40432002113213), we get a palindrome (71663122136617).

The spelling of 31231120023404 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty million, twenty-three thousand, four hundred four".