221882977 has 2 divisors, whose sum is σ = 221882978. Its totient is φ = 221882976.

The previous prime is 221882971. The next prime is 221883041. The reversal of 221882977 is 779288122.

It is a happy number.

221882977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118026496 + 103856481 = 10864^2 + 10191^2 .

It is a cyclic number.

It is not a de Polignac number, because 221882977 - 2¹¹ = 221880929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221882971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110941488 + 110941489.

It is an arithmetic number, because the mean of its divisors is an integer number (110941489).

Almost surely, 2^221882977 is an apocalyptic number.

It is an amenable number.

221882977 is a deficient number, since it is larger than the sum of its proper divisors (1).

221882977 is an equidigital number, since it uses as much as digits as its factorization.

221882977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 46.

The square root of 221882977 is about 14895.7368733474. The cubic root of 221882977 is about 605.3984825589.

The spelling of 221882977 in words is "two hundred twenty-one million, eight hundred eighty-two thousand, nine hundred seventy-seven".