220977 has 12 divisors (see below), whose sum is σ = 327184. Its totient is φ = 143640.

The previous prime is 220973. The next prime is 221021. The reversal of 220977 is 779022.

It is not a de Polignac number, because 220977 - 2² = 220973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220977.

It is not an unprimeable number, because it can be changed into a prime (220973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102 + ... + 672.

2²²⁰⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

220977 is a deficient number, since it is larger than the sum of its proper divisors (106207).

220977 is a wasteful number, since it uses less digits than its factorization.

220977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 220977 is about 470.0819077565. The cubic root of 220977 is about 60.4573385012.

Adding to 220977 its reverse (779022), we get a palindrome (999999).

The spelling of 220977 in words is "two hundred twenty thousand, nine hundred seventy-seven".