22222022281 has 4 divisors (see below), whose sum is σ = 22257240064. Its totient is φ = 22186804500.

The previous prime is 22222022269. The next prime is 22222022287. The reversal of 22222022281 is 18222022222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18222022222 = 2 ⋅9111011111.

It is a cyclic number.

It is not a de Polignac number, because 22222022281 - 2⁹ = 22222021769 is a prime.

It is a super-2 number, since 2×22222022281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22222022287) 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, 17607945 + ... + 17609206.

It is an arithmetic number, because the mean of its divisors is an integer number (5564310016).

Almost surely, 2^22222022281 is an apocalyptic number.

It is an amenable number.

22222022281 is a deficient number, since it is larger than the sum of its proper divisors (35217783).

22222022281 is an equidigital number, since it uses as much as digits as its factorization.

22222022281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35217782.

The product of its (nonzero) digits is 2048, while the sum is 25.

The spelling of 22222022281 in words is "twenty-two billion, two hundred twenty-two million, twenty-two thousand, two hundred eighty-one".