22209987 has 8 divisors (see below), whose sum is σ = 30335760. Its totient is φ = 14445440.

The previous prime is 22209983. The next prime is 22209989. The reversal of 22209987 is 78990222.

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 22209987 - 2² = 22209983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22209983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90162 + ... + 90407.

It is an arithmetic number, because the mean of its divisors is an integer number (3791970).

Almost surely, 2^22209987 is an apocalyptic number.

22209987 is a deficient number, since it is larger than the sum of its proper divisors (8125773).

22209987 is a wasteful number, since it uses less digits than its factorization.

22209987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180613.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 22209987 is about 4712.7472879415. The cubic root of 22209987 is about 281.0926143642.

The spelling of 22209987 in words is "twenty-two million, two hundred nine thousand, nine hundred eighty-seven".