22786261 has 4 divisors (see below), whose sum is σ = 23776992. Its totient is φ = 21795532.

The previous prime is 22786249. The next prime is 22786279. The reversal of 22786261 is 16268722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22786261 - 2⁵ = 22786229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22786241) 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, 495331 + ... + 495376.

It is an arithmetic number, because the mean of its divisors is an integer number (5944248).

Almost surely, 2^22786261 is an apocalyptic number.

It is an amenable number.

22786261 is a deficient number, since it is larger than the sum of its proper divisors (990731).

22786261 is an equidigital number, since it uses as much as digits as its factorization.

22786261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990730.

The product of its digits is 16128, while the sum is 34.

The square root of 22786261 is about 4773.4956792690. The cubic root of 22786261 is about 283.5030197705.

The spelling of 22786261 in words is "twenty-two million, seven hundred eighty-six thousand, two hundred sixty-one".