221414661 has 32 divisors (see below), whose sum is σ = 354453120. Its totient is φ = 135793152.

The previous prime is 221414651. The next prime is 221414663. The reversal of 221414661 is 166414122.

It is not a de Polignac number, because 221414661 - 2⁶ = 221414597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221414663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123010 + ... + 124796.

It is an arithmetic number, because the mean of its divisors is an integer number (11076660).

Almost surely, 2^221414661 is an apocalyptic number.

It is an amenable number.

221414661 is a deficient number, since it is larger than the sum of its proper divisors (133038459).

221414661 is a wasteful number, since it uses less digits than its factorization.

221414661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162 (or 2156 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 221414661 is about 14880.0087701587. The cubic root of 221414661 is about 604.9722556318.

Adding to 221414661 its reverse (166414122), we get a palindrome (387828783).

The spelling of 221414661 in words is "two hundred twenty-one million, four hundred fourteen thousand, six hundred sixty-one".