221444350 has 12 divisors (see below), whose sum is σ = 411886584. Its totient is φ = 88577720.

The previous prime is 221444341. The next prime is 221444357. The reversal of 221444350 is 53444122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221444357) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2214394 + ... + 2214493.

It is an arithmetic number, because the mean of its divisors is an integer number (34323882).

Almost surely, 2^221444350 is an apocalyptic number.

221444350 is a deficient number, since it is larger than the sum of its proper divisors (190442234).

221444350 is a wasteful number, since it uses less digits than its factorization.

221444350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428899 (or 4428894 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 221444350 is about 14881.0063503783. The cubic root of 221444350 is about 604.9992942186. Note that the first 3 decimals are identical.

Adding to 221444350 its reverse (53444122), we get a palindrome (274888472).

It can be divided in two parts, 2214 and 44350, that added together give a palindrome (46564).

The spelling of 221444350 in words is "two hundred twenty-one million, four hundred forty-four thousand, three hundred fifty".