22259081 has 4 divisors (see below), whose sum is σ = 23971332. Its totient is φ = 20546832.

The previous prime is 22259063. The next prime is 22259113. The reversal of 22259081 is 18095222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18095222 = 2 ⋅9047611.

It can be written as a sum of positive squares in 2 ways, for example, as 1638400 + 20620681 = 1280^2 + 4541^2 .

It is a cyclic number.

It is not a de Polignac number, because 22259081 - 2²² = 18064777 is a prime.

It is a super-2 number, since 2×22259081² = 990933373929122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22259381) 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, 856106 + ... + 856131.

It is an arithmetic number, because the mean of its divisors is an integer number (5992833).

Almost surely, 2^22259081 is an apocalyptic number.

It is an amenable number.

22259081 is a deficient number, since it is larger than the sum of its proper divisors (1712251).

22259081 is a wasteful number, since it uses less digits than its factorization.

22259081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712250.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 22259081 is about 4717.9530519072. The cubic root of 22259081 is about 281.2995753926.

The spelling of 22259081 in words is "twenty-two million, two hundred fifty-nine thousand, eighty-one".