221269147 has 8 divisors (see below), whose sum is σ = 241494192. Its totient is φ = 201062400.

The previous prime is 221269133. The next prime is 221269151. The reversal of 221269147 is 741962122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221269147 - 2¹¹ = 221267099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221269187) 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 7 ways as a sum of consecutive naturals, for example, 37947 + ... + 43387.

It is an arithmetic number, because the mean of its divisors is an integer number (30186774).

Almost surely, 2^221269147 is an apocalyptic number.

221269147 is a deficient number, since it is larger than the sum of its proper divisors (20225045).

221269147 is a wasteful number, since it uses less digits than its factorization.

221269147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9149.

The product of its digits is 12096, while the sum is 34.

The square root of 221269147 is about 14875.1183860835. The cubic root of 221269147 is about 604.8396970735.

The spelling of 221269147 in words is "two hundred twenty-one million, two hundred sixty-nine thousand, one hundred forty-seven".