2191899052 has 24 divisors (see below), whose sum is σ = 4614525440. Its totient is φ = 889943760.

The previous prime is 2191899049. The next prime is 2191899053. The reversal of 2191899052 is 2509981912.

It is a junction number, because it is equal to n+sod(n) for n = 2191898993 and 2191899011.

It is not an unprimeable number, because it can be changed into a prime (2191899053) 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, 2059524 + ... + 2060587.

Almost surely, 2^2191899052 is an apocalyptic number.

It is an amenable number.

2191899052 is an abundant number, since it is smaller than the sum of its proper divisors (2422626388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2191899052 is a wasteful number, since it uses less digits than its factorization.

2191899052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120141 (or 4120139 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 46.

The square root of 2191899052 is about 46817.7215592557. The cubic root of 2191899052 is about 1298.9931162016.

The spelling of 2191899052 in words is "two billion, one hundred ninety-one million, eight hundred ninety-nine thousand, fifty-two".