22232261 has 4 divisors (see below), whose sum is σ = 23402400. Its totient is φ = 21062124.

The previous prime is 22232257. The next prime is 22232267. The reversal of 22232261 is 16223222.

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: 16223222 = 2 ⋅8111611.

It is a cyclic number.

It is not a de Polignac number, because 22232261 - 2² = 22232257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22232267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585041 + ... + 585078.

It is an arithmetic number, because the mean of its divisors is an integer number (5850600).

Almost surely, 2^22232261 is an apocalyptic number.

It is an amenable number.

22232261 is a deficient number, since it is larger than the sum of its proper divisors (1170139).

22232261 is a wasteful number, since it uses less digits than its factorization.

22232261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170138.

The product of its digits is 576, while the sum is 20.

The square root of 22232261 is about 4715.1098608622. The cubic root of 22232261 is about 281.1865505594.

Adding to 22232261 its reverse (16223222), we get a palindrome (38455483).

The spelling of 22232261 in words is "twenty-two million, two hundred thirty-two thousand, two hundred sixty-one".