2421568891 has 8 divisors (see below), whose sum is σ = 2768887520. Its totient is φ = 2074595328.

The previous prime is 2421568847. The next prime is 2421568949. The reversal of 2421568891 is 1988651242.

2421568891 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 2421568891 - 2²⁵ = 2388014459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2421568811) 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, 71046 + ... + 99451.

It is an arithmetic number, because the mean of its divisors is an integer number (346110940).

Almost surely, 2^2421568891 is an apocalyptic number.

2421568891 is a deficient number, since it is larger than the sum of its proper divisors (347318629).

2421568891 is a wasteful number, since it uses less digits than its factorization.

2421568891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172533.

The product of its digits is 276480, while the sum is 46.

The square root of 2421568891 is about 49209.4390437444. The cubic root of 2421568891 is about 1342.8647575572.

The spelling of 2421568891 in words is "two billion, four hundred twenty-one million, five hundred sixty-eight thousand, eight hundred ninety-one".