22222001987 has 4 divisors (see below), whose sum is σ = 22229723520. Its totient is φ = 22214280456.

The previous prime is 22222001983. The next prime is 22222002001. The reversal of 22222001987 is 78910022222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22222001987 - 2² = 22222001983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22222001981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3856448 + ... + 3862205.

It is an arithmetic number, because the mean of its divisors is an integer number (5557430880).

Almost surely, 2^22222001987 is an apocalyptic number.

22222001987 is a deficient number, since it is larger than the sum of its proper divisors (7721533).

22222001987 is an equidigital number, since it uses as much as digits as its factorization.

22222001987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7721532.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 22222001987 in words is "twenty-two billion, two hundred twenty-two million, one thousand, nine hundred eighty-seven".