22212987 has 8 divisors (see below), whose sum is σ = 30417936. Its totient is φ = 14408352.

The previous prime is 22212959. The next prime is 22212991. The reversal of 22212987 is 78921222.

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

It is not a de Polignac number, because 22212987 - 2⁷ = 22212859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22212937) 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, 99948 + ... + 100169.

It is an arithmetic number, because the mean of its divisors is an integer number (3802242).

Almost surely, 2^22212987 is an apocalyptic number.

22212987 is a deficient number, since it is larger than the sum of its proper divisors (8204949).

22212987 is a wasteful number, since it uses less digits than its factorization.

22212987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200157.

The product of its digits is 8064, while the sum is 33.

The square root of 22212987 is about 4713.0655628794. The cubic root of 22212987 is about 281.1052699304.

The spelling of 22212987 in words is "twenty-two million, two hundred twelve thousand, nine hundred eighty-seven".