22286881 has 4 divisors (see below), whose sum is σ = 23597892. Its totient is φ = 20975872.

The previous prime is 22286879. The next prime is 22286897. The reversal of 22286881 is 18868222.

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 16483600 + 5803281 = 4060^2 + 2409^2 .

It is a cyclic number.

It is not a de Polignac number, because 22286881 - 2¹ = 22286879 is a prime.

It is a super-2 number, since 2×22286881² = 993410129416322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22286881.

It is not an unprimeable number, because it can be changed into a prime (22286801) 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, 655480 + ... + 655513.

It is an arithmetic number, because the mean of its divisors is an integer number (5899473).

Almost surely, 2^22286881 is an apocalyptic number.

It is an amenable number.

22286881 is a deficient number, since it is larger than the sum of its proper divisors (1311011).

22286881 is a wasteful number, since it uses less digits than its factorization.

22286881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311010.

The product of its digits is 24576, while the sum is 37.

The square root of 22286881 is about 4720.8983255309. The cubic root of 22286881 is about 281.4166343562.

It can be divided in two parts, 22 and 286881, that added together give a triangular number (286903 = T₇₅₇).

The spelling of 22286881 in words is "twenty-two million, two hundred eighty-six thousand, eight hundred eighty-one".