22287621 has 8 divisors (see below), whose sum is σ = 31008960. Its totient is φ = 14212352.

The previous prime is 22287619. The next prime is 22287623. The reversal of 22287621 is 12678222.

It is an interprime number because it is at equal distance from previous prime (22287619) and next prime (22287623).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22287621 - 2¹ = 22287619 is a prime.

It is a Curzon number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22287623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161436 + ... + 161573.

It is an arithmetic number, because the mean of its divisors is an integer number (3876120).

Almost surely, 2^22287621 is an apocalyptic number.

It is an amenable number.

22287621 is a deficient number, since it is larger than the sum of its proper divisors (8721339).

22287621 is a wasteful number, since it uses less digits than its factorization.

22287621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323035.

The product of its digits is 5376, while the sum is 30.

The square root of 22287621 is about 4720.9766997942. The cubic root of 22287621 is about 281.4197489838.

The spelling of 22287621 in words is "twenty-two million, two hundred eighty-seven thousand, six hundred twenty-one".