2149551819 has 6 divisors (see below), whose sum is σ = 3104908196. Its totient is φ = 1433034540.

The previous prime is 2149551809. The next prime is 2149551827. The reversal of 2149551819 is 9181559412.

2149551819 is a `hidden beast` number, since 2 + 14 + 9 + 551 + 81 + 9 = 666.

It is not a de Polignac number, because 2149551819 - 2⁵ = 2149551787 is a prime.

It is a super-2 number, since 2×2149551819² = 9241146045132417522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2149551809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119419537 + ... + 119419554.

Almost surely, 2^2149551819 is an apocalyptic number.

2149551819 is a deficient number, since it is larger than the sum of its proper divisors (955356377).

2149551819 is a wasteful number, since it uses less digits than its factorization.

2149551819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238839097 (or 238839094 counting only the distinct ones).

The product of its digits is 129600, while the sum is 45.

The square root of 2149551819 is about 46363.2593655796. The cubic root of 2149551819 is about 1290.5731921812.

The spelling of 2149551819 in words is "two billion, one hundred forty-nine million, five hundred fifty-one thousand, eight hundred nineteen".