221135416 has 16 divisors (see below), whose sum is σ = 415283400. Its totient is φ = 110393184.

The previous prime is 221135413. The next prime is 221135429. The reversal of 221135416 is 614531122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221135413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16351 + ... + 26638.

Almost surely, 2^221135416 is an apocalyptic number.

It is an amenable number.

221135416 is a deficient number, since it is larger than the sum of its proper divisors (194147984).

221135416 is a wasteful number, since it uses less digits than its factorization.

221135416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43638 (or 43634 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 221135416 is about 14870.6225827973. The cubic root of 221135416 is about 604.7178211901.

Adding to 221135416 its reverse (614531122), we get a palindrome (835666538).

The spelling of 221135416 in words is "two hundred twenty-one million, one hundred thirty-five thousand, four hundred sixteen".