31320113031000 has 192 divisors, whose sum is σ = 105898612135680. Its totient is φ = 8349140198400.

The previous prime is 31320113030981. The next prime is 31320113031001. The reversal of 31320113031000 is 13031102313.

It is a happy number.

31320113031000 is a `hidden beast` number, since 3 + 1 + 320 + 1 + 1 + 30 + 310 + 0 + 0 = 666.

It is a super-2 number, since 2×31320113031000² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320113031001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25472377 + ... + 26673623.

It is an arithmetic number, because the mean of its divisors is an integer number (551555271540).

Almost surely, 2^{31320113031000} is an apocalyptic number.

31320113031000 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 31320113031000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52949306067840).

31320113031000 is an abundant number, since it is smaller than the sum of its proper divisors (74578499104680).

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

31320113031000 is a wasteful number, since it uses less digits than its factorization.

31320113031000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204171 (or 1204154 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31320113031000 its reverse (13031102313), we get a palindrome (31333144133313).

The spelling of 31320113031000 in words is "thirty-one trillion, three hundred twenty billion, one hundred thirteen million, thirty-one thousand".