2145499219 has 4 divisors (see below), whose sum is σ = 2146644144. Its totient is φ = 2144354296.

The previous prime is 2145499177. The next prime is 2145499261. The reversal of 2145499219 is 9129945412.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2145499177) and next prime (2145499261).

It is a cyclic number.

It is not a de Polignac number, because 2145499219 - 2⁷ = 2145499091 is a prime.

It is a super-2 number, since 2×2145499219² = 9206333797459219922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145499819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569647 + ... + 573400.

It is an arithmetic number, because the mean of its divisors is an integer number (536661036).

Almost surely, 2^2145499219 is an apocalyptic number.

2145499219 is a deficient number, since it is larger than the sum of its proper divisors (1144925).

2145499219 is a wasteful number, since it uses less digits than its factorization.

2145499219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144924.

The product of its digits is 233280, while the sum is 46.

The square root of 2145499219 is about 46319.5338815062. The cubic root of 2145499219 is about 1289.7616327393.

The spelling of 2145499219 in words is "two billion, one hundred forty-five million, four hundred ninety-nine thousand, two hundred nineteen".