2191939135 has 8 divisors (see below), whose sum is σ = 2663622720. Its totient is φ = 1731354144.

The previous prime is 2191939129. The next prime is 2191939151. The reversal of 2191939135 is 5319391912.

It is a happy number.

2191939135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2191939135 - 2¹¹ = 2191937087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2191939091 and 2191939100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2774212 + ... + 2775001.

It is an arithmetic number, because the mean of its divisors is an integer number (332952840).

Almost surely, 2^2191939135 is an apocalyptic number.

2191939135 is a deficient number, since it is larger than the sum of its proper divisors (471683585).

2191939135 is an equidigital number, since it uses as much as digits as its factorization.

2191939135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549297.

The product of its digits is 65610, while the sum is 43.

The square root of 2191939135 is about 46818.1496323808. The cubic root of 2191939135 is about 1299.0010343315.

The spelling of 2191939135 in words is "two billion, one hundred ninety-one million, nine hundred thirty-nine thousand, one hundred thirty-five".