222020987 has 2 divisors, whose sum is σ = 222020988. Its totient is φ = 222020986.

The previous prime is 222020983. The next prime is 222020993. The reversal of 222020987 is 789020222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222020987 - 2² = 222020983 is a prime.

It is equal to p_12227666 and since 222020987 and 12227666 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (222020983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111010493 + 111010494.

It is an arithmetic number, because the mean of its divisors is an integer number (111010494).

Almost surely, 2^222020987 is an apocalyptic number.

222020987 is a deficient number, since it is larger than the sum of its proper divisors (1).

222020987 is an equidigital number, since it uses as much as digits as its factorization.

222020987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 222020987 is about 14900.3686867138. The cubic root of 222020987 is about 605.5239747274.

The spelling of 222020987 in words is "two hundred twenty-two million, twenty thousand, nine hundred eighty-seven".