22442287 has 24 divisors (see below), whose sum is σ = 27651456. Its totient is φ = 17835984.

The previous prime is 22442281. The next prime is 22442311. The reversal of 22442287 is 78224422.

It is not a de Polignac number, because 22442287 - 2³ = 22442279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22442281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209688 + ... + 209794.

It is an arithmetic number, because the mean of its divisors is an integer number (1152144).

Almost surely, 2^22442287 is an apocalyptic number.

22442287 is a deficient number, since it is larger than the sum of its proper divisors (5209169).

22442287 is a wasteful number, since it uses less digits than its factorization.

22442287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 216 counting only the distinct ones).

The product of its digits is 14336, while the sum is 31.

The square root of 22442287 is about 4737.3290998199. The cubic root of 22442287 is about 282.0692241573.

The spelling of 22442287 in words is "twenty-two million, four hundred forty-two thousand, two hundred eighty-seven".