2161513200200 has 96 divisors (see below), whose sum is σ = 5071501686600. Its totient is φ = 856698716160.

The previous prime is 2161513200181. The next prime is 2161513200211. The reversal of 2161513200200 is 20023151612.

It can be written as a sum of positive squares in 12 ways, for example, as 79477758724 + 2082035441476 = 281918^2 + 1442926^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87879104 + ... + 87903696.

Almost surely, 2^{2161513200200} is an apocalyptic number.

2161513200200 is a gapful number since it is divisible by the number (20) 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 2161513200200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2535750843300).

2161513200200 is an abundant number, since it is smaller than the sum of its proper divisors (2909988486400).

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

2161513200200 is a wasteful number, since it uses less digits than its factorization.

2161513200200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28611 (or 28602 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 2161513200200 its reverse (20023151612), we get a palindrome (2181536351812).

The spelling of 2161513200200 in words is "two trillion, one hundred sixty-one billion, five hundred thirteen million, two hundred thousand, two hundred".