2187249800 has 36 divisors (see below), whose sum is σ = 5086894005. Its totient is φ = 874635360.

The previous prime is 2187249797. The next prime is 2187249817. The reversal of 2187249800 is 89427812.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 2143504804 + 43744996 = 46298^2 + 6614^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=33070.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 659747 + ... + 663053.

Almost surely, 2^2187249800 is an apocalyptic number.

2187249800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2187249800 is an abundant number, since it is smaller than the sum of its proper divisors (2899644205).

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

2187249800 is an frugal number, since it uses more digits than its factorization.

2187249800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6630 (or 3314 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 2187249800 is about 46768.0425076783. The cubic root of 2187249800 is about 1298.0740316891.

The spelling of 2187249800 in words is "two billion, one hundred eighty-seven million, two hundred forty-nine thousand, eight hundred".