2221519987 has 2 divisors, whose sum is σ = 2221519988. Its totient is φ = 2221519986.

The previous prime is 2221519981. The next prime is 2221520009. The reversal of 2221519987 is 7899151222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221519987 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221519981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110759993 + 1110759994.

It is an arithmetic number, because the mean of its divisors is an integer number (1110759994).

Almost surely, 2^2221519987 is an apocalyptic number.

2221519987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221519987 is an equidigital number, since it uses as much as digits as its factorization.

2221519987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 46.

The square root of 2221519987 is about 47133.0031612669. The cubic root of 2221519987 is about 1304.8184080105.

The spelling of 2221519987 in words is "two billion, two hundred twenty-one million, five hundred nineteen thousand, nine hundred eighty-seven".