22687261 has 4 divisors (see below), whose sum is σ = 22767712. Its totient is φ = 22606812.

The previous prime is 22687237. The next prime is 22687267. The reversal of 22687261 is 16278622.

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 22687261 - 2⁹ = 22686749 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 (22687267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39801 + ... + 40366.

It is an arithmetic number, because the mean of its divisors is an integer number (5691928).

Almost surely, 2^22687261 is an apocalyptic number.

It is an amenable number.

22687261 is a deficient number, since it is larger than the sum of its proper divisors (80451).

22687261 is an equidigital number, since it uses as much as digits as its factorization.

22687261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80450.

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

The square root of 22687261 is about 4763.1146322548. The cubic root of 22687261 is about 283.0918429822.

The spelling of 22687261 in words is "twenty-two million, six hundred eighty-seven thousand, two hundred sixty-one".