2181450199 has 2 divisors, whose sum is σ = 2181450200. Its totient is φ = 2181450198.

The previous prime is 2181450179. The next prime is 2181450233. The reversal of 2181450199 is 9910541812.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2181450199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2181450109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090725099 + 1090725100.

It is an arithmetic number, because the mean of its divisors is an integer number (1090725100).

Almost surely, 2^2181450199 is an apocalyptic number.

2181450199 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181450199 is an equidigital number, since it uses as much as digits as its factorization.

2181450199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 2181450199 is about 46705.9974628527. The cubic root of 2181450199 is about 1296.9257136555.

The spelling of 2181450199 in words is "two billion, one hundred eighty-one million, four hundred fifty thousand, one hundred ninety-nine".