221677055 has 4 divisors (see below), whose sum is σ = 266012472. Its totient is φ = 177341640.

The previous prime is 221677033. The next prime is 221677067. The reversal of 221677055 is 550776122.

It is a happy number.

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

It is not a de Polignac number, because 221677055 - 2⁸ = 221676799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22167701 + ... + 22167710.

It is an arithmetic number, because the mean of its divisors is an integer number (66503118).

Almost surely, 2^221677055 is an apocalyptic number.

221677055 is a deficient number, since it is larger than the sum of its proper divisors (44335417).

221677055 is an equidigital number, since it uses as much as digits as its factorization.

221677055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44335416.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 221677055 is about 14888.8231569859. The cubic root of 221677055 is about 605.2111413853.

The spelling of 221677055 in words is "two hundred twenty-one million, six hundred seventy-seven thousand, fifty-five".