22206261 has 48 divisors (see below), whose sum is σ = 38873088. Its totient is φ = 11138400.

The previous prime is 22206229. The next prime is 22206263. The reversal of 22206261 is 16260222.

It is not a de Polignac number, because 22206261 - 2⁵ = 22206229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22206263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49906 + ... + 50348.

It is an arithmetic number, because the mean of its divisors is an integer number (809856).

Almost surely, 2^22206261 is an apocalyptic number.

22206261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22206261 is a deficient number, since it is larger than the sum of its proper divisors (16666827).

22206261 is a wasteful number, since it uses less digits than its factorization.

22206261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 22206261 is about 4712.3519605395. The cubic root of 22206261 is about 281.0768945643.

Adding to 22206261 its reverse (16260222), we get a palindrome (38466483).

The spelling of 22206261 in words is "twenty-two million, two hundred six thousand, two hundred sixty-one".