221302147 has 8 divisors (see below), whose sum is σ = 244477440. Its totient is φ = 198636360.

The previous prime is 221302111. The next prime is 221302163. The reversal of 221302147 is 741203122.

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

It is a cyclic number.

It is not a de Polignac number, because 221302147 - 2¹⁹ = 220777859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221302187) 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, 126463 + ... + 128200.

It is an arithmetic number, because the mean of its divisors is an integer number (30559680).

Almost surely, 2^221302147 is an apocalyptic number.

221302147 is a deficient number, since it is larger than the sum of its proper divisors (23175293).

221302147 is a wasteful number, since it uses less digits than its factorization.

221302147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254753.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 221302147 is about 14876.2275795983. The cubic root of 221302147 is about 604.8697641029.

Adding to 221302147 its reverse (741203122), we get a palindrome (962505269).

The spelling of 221302147 in words is "two hundred twenty-one million, three hundred two thousand, one hundred forty-seven".