221424134 has 16 divisors (see below), whose sum is σ = 343357056. Its totient is φ = 106982400.

The previous prime is 221424127. The next prime is 221424139. The reversal of 221424134 is 431424122.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221424139) 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, 47174 + ... + 51654.

It is an arithmetic number, because the mean of its divisors is an integer number (21459816).

Almost surely, 2^221424134 is an apocalyptic number.

221424134 is a deficient number, since it is larger than the sum of its proper divisors (121932922).

221424134 is a wasteful number, since it uses less digits than its factorization.

221424134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5311.

The product of its digits is 1536, while the sum is 23.

The square root of 221424134 is about 14880.3270797385. The cubic root of 221424134 is about 604.9808832154.

Adding to 221424134 its reverse (431424122), we get a palindrome (652848256).

The spelling of 221424134 in words is "two hundred twenty-one million, four hundred twenty-four thousand, one hundred thirty-four".