221675147 has 4 divisors (see below), whose sum is σ = 233342280. Its totient is φ = 210008016.

The previous prime is 221675131. The next prime is 221675149. The reversal of 221675147 is 741576122.

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

It is a cyclic number.

It is not a de Polignac number, because 221675147 - 2⁴ = 221675131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221675149) 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, 5833538 + ... + 5833575.

It is an arithmetic number, because the mean of its divisors is an integer number (58335570).

Almost surely, 2^221675147 is an apocalyptic number.

221675147 is a deficient number, since it is larger than the sum of its proper divisors (11667133).

221675147 is a wasteful number, since it uses less digits than its factorization.

221675147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11667132.

The product of its digits is 23520, while the sum is 35.

The square root of 221675147 is about 14888.7590819383. The cubic root of 221675147 is about 605.2094050063.

The spelling of 221675147 in words is "two hundred twenty-one million, six hundred seventy-five thousand, one hundred forty-seven".