22221281687 has 16 divisors (see below), whose sum is σ = 24990024960. Its totient is φ = 19586692800.

The previous prime is 22221281683. The next prime is 22221281759. The reversal of 22221281687 is 78618212222.

It is a cyclic number.

It is not a de Polignac number, because 22221281687 - 2² = 22221281683 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 (22221281683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187139 + ... + 281892.

It is an arithmetic number, because the mean of its divisors is an integer number (1561876560).

Almost surely, 2^22221281687 is an apocalyptic number.

22221281687 is a deficient number, since it is larger than the sum of its proper divisors (2768743273).

22221281687 is a wasteful number, since it uses less digits than its factorization.

22221281687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469174.

The product of its digits is 86016, while the sum is 41.

The spelling of 22221281687 in words is "twenty-two billion, two hundred twenty-one million, two hundred eighty-one thousand, six hundred eighty-seven".