220842641 has 4 divisors (see below), whose sum is σ = 221181492. Its totient is φ = 220503792.

The previous prime is 220842623. The next prime is 220842647. The reversal of 220842641 is 146248022.

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 94167616 + 126675025 = 9704^2 + 11255^2 .

It is a cyclic number.

It is not a de Polignac number, because 220842641 - 2⁶ = 220842577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220842647) 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, 168446 + ... + 169751.

It is an arithmetic number, because the mean of its divisors is an integer number (55295373).

Almost surely, 2^220842641 is an apocalyptic number.

It is an amenable number.

220842641 is a deficient number, since it is larger than the sum of its proper divisors (338851).

220842641 is an equidigital number, since it uses as much as digits as its factorization.

220842641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338850.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 220842641 is about 14860.7752489566. The cubic root of 220842641 is about 604.4508287517.

The spelling of 220842641 in words is "two hundred twenty million, eight hundred forty-two thousand, six hundred forty-one".