22613891 has 2 divisors, whose sum is σ = 22613892. Its totient is φ = 22613890.

The previous prime is 22613887. The next prime is 22613947. The reversal of 22613891 is 19831622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22613891 - 2² = 22613887 is a prime.

It is a super-2 number, since 2×22613891² = 1022776132319762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22613191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11306945 + 11306946.

It is an arithmetic number, because the mean of its divisors is an integer number (11306946).

Almost surely, 2^22613891 is an apocalyptic number.

22613891 is a deficient number, since it is larger than the sum of its proper divisors (1).

22613891 is an equidigital number, since it uses as much as digits as its factorization.

22613891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 22613891 is about 4755.4065020774. The cubic root of 22613891 is about 282.7863429162.

The spelling of 22613891 in words is "twenty-two million, six hundred thirteen thousand, eight hundred ninety-one".