2187242399 has 8 divisors (see below), whose sum is σ = 2317610880. Its totient is φ = 2058399000.

The previous prime is 2187242357. The next prime is 2187242411. The reversal of 2187242399 is 9932427812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2187242399 - 2¹² = 2187238303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187242599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378317 + ... + 384054.

It is an arithmetic number, because the mean of its divisors is an integer number (289701360).

Almost surely, 2^2187242399 is an apocalyptic number.

2187242399 is a deficient number, since it is larger than the sum of its proper divisors (130368481).

2187242399 is a wasteful number, since it uses less digits than its factorization.

2187242399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762541.

The product of its digits is 435456, while the sum is 47.

The square root of 2187242399 is about 46767.9633830681. The cubic root of 2187242399 is about 1298.0725675892.

The spelling of 2187242399 in words is "two billion, one hundred eighty-seven million, two hundred forty-two thousand, three hundred ninety-nine".