221405103 has 16 divisors (see below), whose sum is σ = 329228800. Its totient is φ = 147053880.

The previous prime is 221405101. The next prime is 221405117. The reversal of 221405103 is 301504122.

It is not a de Polignac number, because 221405103 - 2¹ = 221405101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221405101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7813 + ... + 22446.

It is an arithmetic number, because the mean of its divisors is an integer number (20576800).

Almost surely, 2^221405103 is an apocalyptic number.

221405103 is a deficient number, since it is larger than the sum of its proper divisors (107823697).

221405103 is a wasteful number, since it uses less digits than its factorization.

221405103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30539 (or 30533 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 221405103 is about 14879.6875975270. The cubic root of 221405103 is about 604.9635503847.

Adding to 221405103 its reverse (301504122), we get a palindrome (522909225).

The spelling of 221405103 in words is "two hundred twenty-one million, four hundred five thousand, one hundred three".