22251859 has 4 divisors (see below), whose sum is σ = 25430704. Its totient is φ = 19073016.

The previous prime is 22251841. The next prime is 22251863. The reversal of 22251859 is 95815222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95815222 = 2 ⋅47907611.

It is a cyclic number.

It is not a de Polignac number, because 22251859 - 2⁷ = 22251731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22251829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589412 + ... + 1589425.

It is an arithmetic number, because the mean of its divisors is an integer number (6357676).

Almost surely, 2^22251859 is an apocalyptic number.

22251859 is a deficient number, since it is larger than the sum of its proper divisors (3178845).

22251859 is an equidigital number, since it uses as much as digits as its factorization.

22251859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178844.

The product of its digits is 14400, while the sum is 34.

The square root of 22251859 is about 4717.1876155184. The cubic root of 22251859 is about 281.2691493793.

The spelling of 22251859 in words is "twenty-two million, two hundred fifty-one thousand, eight hundred fifty-nine".