221450 has 24 divisors (see below), whose sum is σ = 425568. Its totient is φ = 85680.

The previous prime is 221447. The next prime is 221453. The reversal of 221450 is 54122.

It is an interprime number because it is at equal distance from previous prime (221447) and next prime (221453).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221450.

It is not an unprimeable number, because it can be changed into a prime (221453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2099 + ... + 2201.

It is an arithmetic number, because the mean of its divisors is an integer number (17732).

2²²¹⁴⁵⁰ is an apocalyptic number.

221450 is a deficient number, since it is larger than the sum of its proper divisors (204118).

221450 is a wasteful number, since it uses less digits than its factorization.

221450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 221450 is about 470.5847426341. The cubic root of 221450 is about 60.5004439555.

Adding to 221450 its reverse (54122), we get a palindrome (275572).

The spelling of 221450 in words is "two hundred twenty-one thousand, four hundred fifty".