13251997332 has 96 divisors (see below), whose sum is σ = 39303613440. Its totient is φ = 3782579040.

The previous prime is 13251997307. The next prime is 13251997333. The reversal of 13251997332 is 23379915231.

13251997332 is a `hidden beast` number, since 1 + 32 + 519 + 9 + 73 + 32 = 666.

13251997332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13251997333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 816763 + ... + 832829.

It is an arithmetic number, because the mean of its divisors is an integer number (409412640).

Almost surely, 2^13251997332 is an apocalyptic number.

13251997332 is a gapful number since it is divisible by the number (12) 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 13251997332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19651806720).

13251997332 is an abundant number, since it is smaller than the sum of its proper divisors (26051616108).

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

13251997332 is a wasteful number, since it uses less digits than its factorization.

13251997332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17178 (or 17170 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The spelling of 13251997332 in words is "thirteen billion, two hundred fifty-one million, nine hundred ninety-seven thousand, three hundred thirty-two".