2199945791 has 16 divisors (see below), whose sum is σ = 2323776000. Its totient is φ = 2078572320.

The previous prime is 2199945767. The next prime is 2199945817. The reversal of 2199945791 is 1975499912.

It is a cyclic number.

It is not a de Polignac number, because 2199945791 - 2²² = 2195751487 is a prime.

It is a super-2 number, since 2×2199945791² = 9679522966677231362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199945731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1181201 + ... + 1183061.

It is an arithmetic number, because the mean of its divisors is an integer number (145236000).

Almost surely, 2^2199945791 is an apocalyptic number.

2199945791 is a deficient number, since it is larger than the sum of its proper divisors (123830209).

2199945791 is a wasteful number, since it uses less digits than its factorization.

2199945791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486.

The product of its digits is 1837080, while the sum is 56.

The square root of 2199945791 is about 46903.5797247929. The cubic root of 2199945791 is about 1300.5807643755.

The spelling of 2199945791 in words is "two billion, one hundred ninety-nine million, nine hundred forty-five thousand, seven hundred ninety-one".