22409261 has 8 divisors (see below), whose sum is σ = 25707264. Its totient is φ = 19135440.

The previous prime is 22409251. The next prime is 22409267. The reversal of 22409261 is 16290422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22409261 - 2²² = 18214957 is a prime.

It is a super-2 number, since 2×22409261² = 1004349957132242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22409261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22409267) 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 7 ways as a sum of consecutive naturals, for example, 4010 + ... + 7803.

It is an arithmetic number, because the mean of its divisors is an integer number (3213408).

Almost surely, 2^22409261 is an apocalyptic number.

It is an amenable number.

22409261 is a deficient number, since it is larger than the sum of its proper divisors (3298003).

22409261 is a wasteful number, since it uses less digits than its factorization.

22409261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12091.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 22409261 is about 4733.8420970708. The cubic root of 22409261 is about 281.9307921643.

Adding to 22409261 its reverse (16290422), we get a palindrome (38699683).

The spelling of 22409261 in words is "twenty-two million, four hundred nine thousand, two hundred sixty-one".