221252055 has 32 divisors (see below), whose sum is σ = 374803200. Its totient is φ = 111140352.

The previous prime is 221252039. The next prime is 221252081. The reversal of 221252055 is 550252122.

It is not a de Polignac number, because 221252055 - 2⁴ = 221252039 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 48847 + ... + 53183.

It is an arithmetic number, because the mean of its divisors is an integer number (11712600).

Almost surely, 2^221252055 is an apocalyptic number.

221252055 is a deficient number, since it is larger than the sum of its proper divisors (153551145).

221252055 is a wasteful number, since it uses less digits than its factorization.

221252055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 221252055 is about 14874.5438585524. The cubic root of 221252055 is about 604.8241229994.

The spelling of 221252055 in words is "two hundred twenty-one million, two hundred fifty-two thousand, fifty-five".