22189261 has 4 divisors (see below), whose sum is σ = 22520512. Its totient is φ = 21858012.

The previous prime is 22189253. The next prime is 22189291. The reversal of 22189261 is 16298122.

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.

It is a cyclic number.

It is not a de Polignac number, because 22189261 - 2³ = 22189253 is a prime.

It is a super-2 number, since 2×22189261² = 984726607452242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22189201) 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, 165525 + ... + 165658.

It is an arithmetic number, because the mean of its divisors is an integer number (5630128).

Almost surely, 2^22189261 is an apocalyptic number.

It is an amenable number.

22189261 is a deficient number, since it is larger than the sum of its proper divisors (331251).

22189261 is an equidigital number, since it uses as much as digits as its factorization.

22189261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331250.

The product of its digits is 3456, while the sum is 31.

The square root of 22189261 is about 4710.5478449964. The cubic root of 22189261 is about 281.0051501274.

The spelling of 22189261 in words is "twenty-two million, one hundred eighty-nine thousand, two hundred sixty-one".