22163287 has 4 divisors (see below), whose sum is σ = 22223080. Its totient is φ = 22103496.

The previous prime is 22163263. The next prime is 22163299. The reversal of 22163287 is 78236122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22163287 - 2⁷ = 22163159 is a prime.

It is a super-2 number, since 2×22163287² = 982422581288738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22163887) 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, 29337 + ... + 30082.

It is an arithmetic number, because the mean of its divisors is an integer number (5555770).

Almost surely, 2^22163287 is an apocalyptic number.

22163287 is a deficient number, since it is larger than the sum of its proper divisors (59793).

22163287 is an equidigital number, since it uses as much as digits as its factorization.

22163287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59792.

The product of its digits is 8064, while the sum is 31.

The square root of 22163287 is about 4707.7900335508. The cubic root of 22163287 is about 280.8954622692.

The spelling of 22163287 in words is "twenty-two million, one hundred sixty-three thousand, two hundred eighty-seven".