220276621 has 4 divisors (see below), whose sum is σ = 222547612. Its totient is φ = 218005632.

The previous prime is 220276613. The next prime is 220276627. The reversal of 220276621 is 126672022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30140100 + 190136521 = 5490^2 + 13789^2 .

It is a cyclic number.

It is not a de Polignac number, because 220276621 - 2³ = 220276613 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 220276621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220276627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135350 + ... + 1135543.

It is an arithmetic number, because the mean of its divisors is an integer number (55636903).

Almost surely, 2^220276621 is an apocalyptic number.

It is an amenable number.

220276621 is a deficient number, since it is larger than the sum of its proper divisors (2270991).

220276621 is an equidigital number, since it uses as much as digits as its factorization.

220276621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270990.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 220276621 is about 14841.7189368348. The cubic root of 220276621 is about 603.9339841668.

The spelling of 220276621 in words is "two hundred twenty million, two hundred seventy-six thousand, six hundred twenty-one".