22204261 has 4 divisors (see below), whose sum is σ = 23510412. Its totient is φ = 20898112.

The previous prime is 22204253. The next prime is 22204307. The reversal of 22204261 is 16240222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10439361 + 11764900 = 3231^2 + 3430^2 .

It is a cyclic number.

It is not a de Polignac number, because 22204261 - 2³ = 22204253 is a prime.

It is a super-2 number, since 2×22204261² = 986058413112242, 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 (22204241) 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, 653050 + ... + 653083.

It is an arithmetic number, because the mean of its divisors is an integer number (5877603).

Almost surely, 2^22204261 is an apocalyptic number.

It is an amenable number.

22204261 is a deficient number, since it is larger than the sum of its proper divisors (1306151).

22204261 is a wasteful number, since it uses less digits than its factorization.

22204261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306150.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 22204261 is about 4712.1397475033. The cubic root of 22204261 is about 281.0684559432.

Adding to 22204261 its reverse (16240222), we get a palindrome (38444483).

The spelling of 22204261 in words is "twenty-two million, two hundred four thousand, two hundred sixty-one".