221331414 has 16 divisors (see below), whose sum is σ = 443690352. Its totient is φ = 73605888.

The previous prime is 221331389. The next prime is 221331419. The reversal of 221331414 is 414133122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39999 + ... + 45194.

It is an arithmetic number, because the mean of its divisors is an integer number (27730647).

Almost surely, 2^221331414 is an apocalyptic number.

221331414 is an abundant number, since it is smaller than the sum of its proper divisors (222358938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221331414 is a wasteful number, since it uses less digits than its factorization.

221331414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85631.

The product of its digits is 576, while the sum is 21.

The square root of 221331414 is about 14877.2112306037. The cubic root of 221331414 is about 604.8964274126.

Adding to 221331414 its reverse (414133122), we get a palindrome (635464536).

The spelling of 221331414 in words is "two hundred twenty-one million, three hundred thirty-one thousand, four hundred fourteen".