22088819 has 4 divisors (see below), whose sum is σ = 22188096. Its totient is φ = 21989544.

The previous prime is 22088789. The next prime is 22088839. The reversal of 22088819 is 91888022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91888022 = 2 ⋅45944011.

It is a cyclic number.

It is not a de Polignac number, because 22088819 - 2¹⁶ = 22023283 is a prime.

It is a super-2 number, since 2×22088819² = 975831849629522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22088839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49304 + ... + 49749.

It is an arithmetic number, because the mean of its divisors is an integer number (5547024).

Almost surely, 2^22088819 is an apocalyptic number.

22088819 is a deficient number, since it is larger than the sum of its proper divisors (99277).

22088819 is an equidigital number, since it uses as much as digits as its factorization.

22088819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99276.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 22088819 is about 4699.8743600228. The cubic root of 22088819 is about 280.5805090651.

The spelling of 22088819 in words is "twenty-two million, eighty-eight thousand, eight hundred nineteen".