220055261 has 4 divisors (see below), whose sum is σ = 221284800. Its totient is φ = 218825724.

The previous prime is 220055233. The next prime is 220055263. The reversal of 220055261 is 162550022.

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.

It is a cyclic number.

It is not a de Polignac number, because 220055261 - 2⁶ = 220055197 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 (220055263) 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, 614501 + ... + 614858.

It is an arithmetic number, because the mean of its divisors is an integer number (55321200).

Almost surely, 2^220055261 is an apocalyptic number.

It is an amenable number.

220055261 is a deficient number, since it is larger than the sum of its proper divisors (1229539).

220055261 is a wasteful number, since it uses less digits than its factorization.

220055261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229538.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 220055261 is about 14834.2597051555. The cubic root of 220055261 is about 603.7316149328.

The spelling of 220055261 in words is "two hundred twenty million, fifty-five thousand, two hundred sixty-one".