221435450 has 12 divisors (see below), whose sum is σ = 411870030. Its totient is φ = 88574160.

The previous prime is 221435441. The next prime is 221435497. The reversal of 221435450 is 54534122.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 104427961 + 117007489 = 10219^2 + 10817^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2214305 + ... + 2214404.

Almost surely, 2^221435450 is an apocalyptic number.

221435450 is a deficient number, since it is larger than the sum of its proper divisors (190434580).

221435450 is a wasteful number, since it uses less digits than its factorization.

221435450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428721 (or 4428716 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 221435450 is about 14880.7073084582. The cubic root of 221435450 is about 604.9911889981.

Adding to 221435450 its reverse (54534122), we get a palindrome (275969572).

The spelling of 221435450 in words is "two hundred twenty-one million, four hundred thirty-five thousand, four hundred fifty".