2198765191 has 24 divisors (see below), whose sum is σ = 2616206064. Its totient is φ = 1841978880.

The previous prime is 2198765171. The next prime is 2198765207. The reversal of 2198765191 is 1915678912.

2198765191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2198765191 - 2¹¹ = 2198763143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198765141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 484951 + ... + 489463.

It is an arithmetic number, because the mean of its divisors is an integer number (109008586).

Almost surely, 2^2198765191 is an apocalyptic number.

2198765191 is a deficient number, since it is larger than the sum of its proper divisors (417440873).

2198765191 is a wasteful number, since it uses less digits than its factorization.

2198765191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751 (or 4744 counting only the distinct ones).

The product of its digits is 272160, while the sum is 49.

The square root of 2198765191 is about 46890.9926425108. The cubic root of 2198765191 is about 1300.3480707022.

It can be divided in two parts, 21987 and 65191, that added together give a palindrome (87178).

The spelling of 2198765191 in words is "two billion, one hundred ninety-eight million, seven hundred sixty-five thousand, one hundred ninety-one".