2191127155 has 16 divisors (see below), whose sum is σ = 3006350784. Its totient is φ = 1501799040.

The previous prime is 2191127149. The next prime is 2191127167. The reversal of 2191127155 is 5517211912.

It is a happy number.

2191127155 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 2191127155 - 2²¹ = 2189030003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2191127155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70189 + ... + 96481.

It is an arithmetic number, because the mean of its divisors is an integer number (187896924).

Almost surely, 2^2191127155 is an apocalyptic number.

2191127155 is a deficient number, since it is larger than the sum of its proper divisors (815223629).

2191127155 is a wasteful number, since it uses less digits than its factorization.

2191127155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28686.

The product of its digits is 6300, while the sum is 34.

The square root of 2191127155 is about 46809.4771921242. The cubic root of 2191127155 is about 1298.8406142554.

The spelling of 2191127155 in words is "two billion, one hundred ninety-one million, one hundred twenty-seven thousand, one hundred fifty-five".