2187099641 has 4 divisors (see below), whose sum is σ = 2262516900. Its totient is φ = 2111682384.

The previous prime is 2187099571. The next prime is 2187099653. The reversal of 2187099641 is 1469907812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1812290041 + 374809600 = 42571^2 + 19360^2 .

It is a cyclic number.

It is not a de Polignac number, because 2187099641 - 2²⁶ = 2119990777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2187093641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37708586 + ... + 37708643.

It is an arithmetic number, because the mean of its divisors is an integer number (565629225).

Almost surely, 2^2187099641 is an apocalyptic number.

It is an amenable number.

2187099641 is a deficient number, since it is larger than the sum of its proper divisors (75417259).

2187099641 is an equidigital number, since it uses as much as digits as its factorization.

2187099641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75417258.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 2187099641 is about 46766.4371210808. The cubic root of 2187099641 is about 1298.0443258977.

The spelling of 2187099641 in words is "two billion, one hundred eighty-seven million, ninety-nine thousand, six hundred forty-one".