31163322113280 has 432 divisors, whose sum is σ = 123574161634560. Its totient is φ = 7102859968512.

The previous prime is 31163322113267. The next prime is 31163322113281. The reversal of 31163322113280 is 8231122336113.

31163322113280 is a `hidden beast` number, since 3 + 1 + 1 + 6 + 3 + 322 + 1 + 1 + 328 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31163322113281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27918541 + ... + 29013299.

It is an arithmetic number, because the mean of its divisors is an integer number (286051300080).

Almost surely, 2^{31163322113280} is an apocalyptic number.

31163322113280 is a gapful number since it is divisible by the number (30) 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 31163322113280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61787080817280).

31163322113280 is an abundant number, since it is smaller than the sum of its proper divisors (92410839521280).

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

31163322113280 is a wasteful number, since it uses less digits than its factorization.

31163322113280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095146 (or 1095129 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

Adding to 31163322113280 its reverse (8231122336113), we get a palindrome (39394444449393).

The spelling of 31163322113280 in words is "thirty-one trillion, one hundred sixty-three billion, three hundred twenty-two million, one hundred thirteen thousand, two hundred eighty".