221213414 has 16 divisors (see below), whose sum is σ = 345950352. Its totient is φ = 105993888.

The previous prime is 221213413. The next prime is 221213437. The reversal of 221213414 is 414312122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221213411) 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, 19709 + ... + 28824.

It is an arithmetic number, because the mean of its divisors is an integer number (21621897).

Almost surely, 2^221213414 is an apocalyptic number.

221213414 is a deficient number, since it is larger than the sum of its proper divisors (124736938).

221213414 is a wasteful number, since it uses less digits than its factorization.

221213414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48631.

The product of its digits is 384, while the sum is 20.

The square root of 221213414 is about 14873.2449048619. The cubic root of 221213414 is about 604.7889107168.

Adding to 221213414 its reverse (414312122), we get a palindrome (635525536).

The spelling of 221213414 in words is "two hundred twenty-one million, two hundred thirteen thousand, four hundred fourteen".