22715891 has 8 divisors (see below), whose sum is σ = 25451184. Its totient is φ = 20092320.

The previous prime is 22715867. The next prime is 22715909. The reversal of 22715891 is 19851722.

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 22715891 - 2⁶ = 22715827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22715801) 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, 27500 + ... + 28313.

It is an arithmetic number, because the mean of its divisors is an integer number (3181398).

Almost surely, 2^22715891 is an apocalyptic number.

22715891 is a deficient number, since it is larger than the sum of its proper divisors (2735293).

22715891 is a wasteful number, since it uses less digits than its factorization.

22715891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55861.

The product of its digits is 10080, while the sum is 35.

The square root of 22715891 is about 4766.1190711102. The cubic root of 22715891 is about 283.2108747234.

The spelling of 22715891 in words is "twenty-two million, seven hundred fifteen thousand, eight hundred ninety-one".