22605261 has 32 divisors (see below), whose sum is σ = 36188160. Its totient is φ = 12280896.

The previous prime is 22605259. The next prime is 22605263. The reversal of 22605261 is 16250622.

It is an interprime number because it is at equal distance from previous prime (22605259) and next prime (22605263).

It is not a de Polignac number, because 22605261 - 2¹ = 22605259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22605263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36210 + ... + 36828.

It is an arithmetic number, because the mean of its divisors is an integer number (1130880).

Almost surely, 2^22605261 is an apocalyptic number.

22605261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22605261 is a deficient number, since it is larger than the sum of its proper divisors (13582899).

22605261 is a wasteful number, since it uses less digits than its factorization.

22605261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 22605261 is about 4754.4990272373. The cubic root of 22605261 is about 282.7503656689.

Adding to 22605261 its reverse (16250622), we get a palindrome (38855883).

The spelling of 22605261 in words is "twenty-two million, six hundred five thousand, two hundred sixty-one".