220368887 has 4 divisors (see below), whose sum is σ = 220498656. Its totient is φ = 220239120.

The previous prime is 220368839. The next prime is 220368899. The reversal of 220368887 is 788863022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788863022 = 2 ⋅394431511.

It is a cyclic number.

It is not a de Polignac number, because 220368887 - 2²² = 216174583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220368817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62303 + ... + 65744.

It is an arithmetic number, because the mean of its divisors is an integer number (55124664).

Almost surely, 2^220368887 is an apocalyptic number.

220368887 is a deficient number, since it is larger than the sum of its proper divisors (129769).

220368887 is a wasteful number, since it uses less digits than its factorization.

220368887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129768.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 220368887 is about 14844.8269440907. The cubic root of 220368887 is about 604.0182945133.

The spelling of 220368887 in words is "two hundred twenty million, three hundred sixty-eight thousand, eight hundred eighty-seven".