13215510800 has 120 divisors (see below), whose sum is σ = 34500053760. Its totient is φ = 4846348800.

The previous prime is 13215510787. The next prime is 13215510809. The reversal of 13215510800 is 801551231.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13215510800.

It is not an unprimeable number, because it can be changed into a prime (13215510809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207554 + ... + 263646.

It is an arithmetic number, because the mean of its divisors is an integer number (287500448).

Almost surely, 2^13215510800 is an apocalyptic number.

13215510800 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 13215510800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17250026880).

13215510800 is an abundant number, since it is smaller than the sum of its proper divisors (21284542960).

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

13215510800 is a wasteful number, since it uses less digits than its factorization.

13215510800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56161 (or 56150 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 13215510800 in words is "thirteen billion, two hundred fifteen million, five hundred ten thousand, eight hundred".