22004261 has 16 divisors (see below), whose sum is σ = 24752640. Its totient is φ = 19459440.

The previous prime is 22004251. The next prime is 22004263. The reversal of 22004261 is 16240022.

It is a cyclic number.

It is not a de Polignac number, because 22004261 - 2¹⁰ = 22003237 is a prime.

It is a super-2 number, since 2×22004261² = 968375004312242, 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 (22004263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18206 + ... + 19376.

It is an arithmetic number, because the mean of its divisors is an integer number (1547040).

Almost surely, 2^22004261 is an apocalyptic number.

It is an amenable number.

22004261 is a deficient number, since it is larger than the sum of its proper divisors (2748379).

22004261 is a wasteful number, since it uses less digits than its factorization.

22004261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 22004261 is about 4690.8699619580. The cubic root of 22004261 is about 280.2220220335. Note that the first 3 decimals are identical.

Adding to 22004261 its reverse (16240022), we get a palindrome (38244283).

The spelling of 22004261 in words is "twenty-two million, four thousand, two hundred sixty-one".