2022220987 has 4 divisors (see below), whose sum is σ = 2022411976. Its totient is φ = 2022030000.

The previous prime is 2022220909. The next prime is 2022221021. The reversal of 2022220987 is 7890222202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7890222202 = 2 ⋅3945111101.

It is a cyclic number.

It is not a de Polignac number, because 2022220987 - 2⁷ = 2022220859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2022220087) 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, 78618 + ... + 101119.

It is an arithmetic number, because the mean of its divisors is an integer number (505602994).

Almost surely, 2^2022220987 is an apocalyptic number.

2022220987 is a deficient number, since it is larger than the sum of its proper divisors (190989).

2022220987 is a wasteful number, since it uses less digits than its factorization.

2022220987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190988.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 2022220987 is about 44969.1114766570. Note that the first 3 decimals coincide. The cubic root of 2022220987 is about 1264.5699897099.

It can be divided in two parts, 20222 and 20987, that added together give a square (41209 = 203²).

The spelling of 2022220987 in words is "two billion, twenty-two million, two hundred twenty thousand, nine hundred eighty-seven".