31113354551552 has 144 divisors (see below), whose sum is σ = 76441469811840. Its totient is φ = 12307881885696.

The previous prime is 31113354551527. The next prime is 31113354551597. The reversal of 31113354551552 is 25515545331113.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651169199 + ... + 651216977.

It is an arithmetic number, because the mean of its divisors is an integer number (530843540360).

Almost surely, 2^{31113354551552} is an apocalyptic number.

31113354551552 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31113354551552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38220734905920).

31113354551552 is an abundant number, since it is smaller than the sum of its proper divisors (45328115260288).

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

31113354551552 is a wasteful number, since it uses less digits than its factorization.

31113354551552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75768 (or 75754 counting only the distinct ones).

The product of its digits is 675000, while the sum is 44.

Adding to 31113354551552 its reverse (25515545331113), we get a palindrome (56628899882665).

The spelling of 31113354551552 in words is "thirty-one trillion, one hundred thirteen billion, three hundred fifty-four million, five hundred fifty-one thousand, five hundred fifty-two".