2191563741 has 8 divisors (see below), whose sum is σ = 2922414880. Its totient is φ = 1460877552.

The previous prime is 2191563719. The next prime is 2191563779. The reversal of 2191563741 is 1473651912.

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

It is not a de Polignac number, because 2191563741 - 2⁶ = 2191563677 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 2191563741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191563541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5911 + ... + 66468.

It is an arithmetic number, because the mean of its divisors is an integer number (365301860).

Almost surely, 2^2191563741 is an apocalyptic number.

It is an amenable number.

2191563741 is a deficient number, since it is larger than the sum of its proper divisors (730851139).

2191563741 is a wasteful number, since it uses less digits than its factorization.

2191563741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82475.

The product of its digits is 45360, while the sum is 39.

The square root of 2191563741 is about 46814.1403958248. The cubic root of 2191563741 is about 1298.9268739641.

The spelling of 2191563741 in words is "two billion, one hundred ninety-one million, five hundred sixty-three thousand, seven hundred forty-one".