31102400143320 has 256 divisors, whose sum is σ = 104166534574080. Its totient is φ = 7363944537600.

The previous prime is 31102400143313. The next prime is 31102400143351. The reversal of 31102400143320 is 2334100420113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 881294875 + ... + 881330165.

It is an arithmetic number, because the mean of its divisors is an integer number (406900525680).

Almost surely, 2^{31102400143320} is an apocalyptic number.

31102400143320 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 31102400143320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52083267287040).

31102400143320 is an abundant number, since it is smaller than the sum of its proper divisors (73064134430760).

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

31102400143320 is a wasteful number, since it uses less digits than its factorization.

31102400143320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50886 (or 50882 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31102400143320 its reverse (2334100420113), we get a palindrome (33436500563433).

The spelling of 31102400143320 in words is "thirty-one trillion, one hundred two billion, four hundred million, one hundred forty-three thousand, three hundred twenty".