221442450 has 24 divisors (see below), whose sum is σ = 549177648. Its totient is φ = 59051280.

The previous prime is 221442443. The next prime is 221442457. The reversal of 221442450 is 54244122.

It is a happy number.

221442450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221442443) and next prime (221442457).

It is a self number, because there is not a number n which added to its sum of digits gives 221442450.

It is not an unprimeable number, because it can be changed into a prime (221442457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 737992 + ... + 738291.

It is an arithmetic number, because the mean of its divisors is an integer number (22882402).

Almost surely, 2^221442450 is an apocalyptic number.

221442450 is an abundant number, since it is smaller than the sum of its proper divisors (327735198).

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

221442450 is a wasteful number, since it uses less digits than its factorization.

221442450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476298 (or 1476293 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 221442450 is about 14880.9425104729. The cubic root of 221442450 is about 604.9975639089.

Adding to 221442450 its reverse (54244122), we get a palindrome (275686572).

The spelling of 221442450 in words is "two hundred twenty-one million, four hundred forty-two thousand, four hundred fifty".