2198291881 has 4 divisors (see below), whose sum is σ = 2249414992. Its totient is φ = 2147168772.

The previous prime is 2198291867. The next prime is 2198291897. The reversal of 2198291881 is 1881928912.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2198291881 - 2¹¹ = 2198289833 is a prime.

It is a super-2 number, since 2×2198291881² = 9664974388141036322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2198291281) 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 in 3 ways as a sum of consecutive naturals, for example, 25561491 + ... + 25561576.

It is an arithmetic number, because the mean of its divisors is an integer number (562353748).

Almost surely, 2^2198291881 is an apocalyptic number.

It is an amenable number.

2198291881 is a deficient number, since it is larger than the sum of its proper divisors (51123111).

2198291881 is an equidigital number, since it uses as much as digits as its factorization.

2198291881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51123110.

The product of its digits is 165888, while the sum is 49.

The square root of 2198291881 is about 46885.9454527687. The cubic root of 2198291881 is about 1300.2547589478.

The spelling of 2198291881 in words is "two billion, one hundred ninety-eight million, two hundred ninety-one thousand, eight hundred eighty-one".