22728851 has 2 divisors, whose sum is σ = 22728852. Its totient is φ = 22728850.

The previous prime is 22728821. The next prime is 22728857. The reversal of 22728851 is 15882722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22728851 - 2²² = 18534547 is a prime.

It is not a weakly prime, because it can be changed into another prime (22728857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11364425 + 11364426.

It is an arithmetic number, because the mean of its divisors is an integer number (11364426).

Almost surely, 2^22728851 is an apocalyptic number.

22728851 is a deficient number, since it is larger than the sum of its proper divisors (1).

22728851 is an equidigital number, since it uses as much as digits as its factorization.

22728851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 35.

The square root of 22728851 is about 4767.4784739944. The cubic root of 22728851 is about 283.2647241796.

The spelling of 22728851 in words is "twenty-two million, seven hundred twenty-eight thousand, eight hundred fifty-one".