13031212320 has 288 divisors, whose sum is σ = 53497342080. Its totient is φ = 2821754880.

The previous prime is 13031212303. The next prime is 13031212333. The reversal of 13031212320 is 2321213031.

13031212320 is a `hidden beast` number, since 1 + 30 + 312 + 1 + 2 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a junction number, because it is equal to n+sod(n) for n = 13031212293 and 13031212302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157500 + ... + 225540.

It is an arithmetic number, because the mean of its divisors is an integer number (185754660).

Almost surely, 2^13031212320 is an apocalyptic number.

13031212320 is a gapful number since it is divisible by the number (10) 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 13031212320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26748671040).

13031212320 is an abundant number, since it is smaller than the sum of its proper divisors (40466129760).

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

13031212320 is a wasteful number, since it uses less digits than its factorization.

13031212320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68088 (or 68077 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13031212320 its reverse (2321213031), we get a palindrome (15352425351).

The spelling of 13031212320 in words is "thirteen billion, thirty-one million, two hundred twelve thousand, three hundred twenty".