221115413 has 8 divisors (see below), whose sum is σ = 234306432. Its totient is φ = 207944896.

The previous prime is 221115341. The next prime is 221115437. The reversal of 221115413 is 314511122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221115413 - 2²² = 216921109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221115443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20906 + ... + 29652.

It is an arithmetic number, because the mean of its divisors is an integer number (29288304).

Almost surely, 2^221115413 is an apocalyptic number.

It is an amenable number.

221115413 is a deficient number, since it is larger than the sum of its proper divisors (13191019).

221115413 is a wasteful number, since it uses less digits than its factorization.

221115413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10251.

The product of its digits is 240, while the sum is 20.

The square root of 221115413 is about 14869.9499999159. The cubic root of 221115413 is about 604.6995872115.

Adding to 221115413 its reverse (314511122), we get a palindrome (535626535).

The spelling of 221115413 in words is "two hundred twenty-one million, one hundred fifteen thousand, four hundred thirteen".