221341450 has 96 divisors (see below), whose sum is σ = 482112000. Its totient is φ = 74750400.

The previous prime is 221341441. The next prime is 221341453. The reversal of 221341450 is 54143122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (221341453) 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 47 ways as a sum of consecutive naturals, for example, 616371 + ... + 616729.

It is an arithmetic number, because the mean of its divisors is an integer number (5022000).

Almost surely, 2^221341450 is an apocalyptic number.

221341450 is an abundant number, since it is smaller than the sum of its proper divisors (260770550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221341450 is a wasteful number, since it uses less digits than its factorization.

221341450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 221341450 is about 14877.5485211778. The cubic root of 221341450 is about 604.9055700352.

Adding to 221341450 its reverse (54143122), we get a palindrome (275484572).

The spelling of 221341450 in words is "two hundred twenty-one million, three hundred forty-one thousand, four hundred fifty".