2191450859 has 8 divisors (see below), whose sum is σ = 2441404560. Its totient is φ = 1953122976.

The previous prime is 2191450831. The next prime is 2191450883. The reversal of 2191450859 is 9580541912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2191450859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2191450819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2906057 + ... + 2906810.

It is an arithmetic number, because the mean of its divisors is an integer number (305175570).

Almost surely, 2^2191450859 is an apocalyptic number.

2191450859 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2191450859 is a deficient number, since it is larger than the sum of its proper divisors (249953701).

2191450859 is a wasteful number, since it uses less digits than its factorization.

2191450859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5812909.

The product of its (nonzero) digits is 129600, while the sum is 44.

The square root of 2191450859 is about 46812.9347403044. The cubic root of 2191450859 is about 1298.9045720831.

The spelling of 2191450859 in words is "two billion, one hundred ninety-one million, four hundred fifty thousand, eight hundred fifty-nine".