22722287 has 8 divisors (see below), whose sum is σ = 26806272. Its totient is φ = 18847800.

The previous prime is 22722263. The next prime is 22722299. The reversal of 22722287 is 78222722.

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 22722287 - 2⁶ = 22722223 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 (22722247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52139 + ... + 52572.

It is an arithmetic number, because the mean of its divisors is an integer number (3350784).

Almost surely, 2^22722287 is an apocalyptic number.

22722287 is a deficient number, since it is larger than the sum of its proper divisors (4083985).

22722287 is a wasteful number, since it uses less digits than its factorization.

22722287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104749.

The product of its digits is 12544, while the sum is 32.

The square root of 22722287 is about 4766.7900100592. The cubic root of 22722287 is about 283.2374529863.

The spelling of 22722287 in words is "twenty-two million, seven hundred twenty-two thousand, two hundred eighty-seven".