220550689 has 4 divisors (see below), whose sum is σ = 232158640. Its totient is φ = 208942740.

The previous prime is 220550641. The next prime is 220550719. The reversal of 220550689 is 986055022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 986055022 = 2 ⋅493027511.

It is a cyclic number.

It is not a de Polignac number, because 220550689 - 2¹¹ = 220548641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220550609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5803947 + ... + 5803984.

It is an arithmetic number, because the mean of its divisors is an integer number (58039660).

Almost surely, 2^220550689 is an apocalyptic number.

It is an amenable number.

220550689 is a deficient number, since it is larger than the sum of its proper divisors (11607951).

220550689 is a wasteful number, since it uses less digits than its factorization.

220550689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11607950.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 220550689 is about 14850.9490942498. The cubic root of 220550689 is about 604.1843517571.

The spelling of 220550689 in words is "two hundred twenty million, five hundred fifty thousand, six hundred eighty-nine".