2223021987 has 12 divisors (see below), whose sum is σ = 3223529400. Its totient is φ = 1476246528.

The previous prime is 2223021979. The next prime is 2223021989. The reversal of 2223021987 is 7891203222.

It is not a de Polignac number, because 2223021987 - 2³ = 2223021979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2223021989) 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 11 ways as a sum of consecutive naturals, for example, 478237 + ... + 482862.

It is an arithmetic number, because the mean of its divisors is an integer number (268627450).

Almost surely, 2^2223021987 is an apocalyptic number.

2223021987 is a deficient number, since it is larger than the sum of its proper divisors (1000507413).

2223021987 is a wasteful number, since it uses less digits than its factorization.

2223021987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961362 (or 961359 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 2223021987 is about 47148.9341024800. The cubic root of 2223021987 is about 1305.1124102755.

The spelling of 2223021987 in words is "two billion, two hundred twenty-three million, twenty-one thousand, nine hundred eighty-seven".