221435134 has 16 divisors (see below), whose sum is σ = 341743248. Its totient is φ = 107566272.

The previous prime is 221435131. The next prime is 221435141. The reversal of 221435134 is 431534122.

It is a junction number, because it is equal to n+sod(n) for n = 221435099 and 221435108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221435131) 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, 1537 + ... + 21100.

It is an arithmetic number, because the mean of its divisors is an integer number (21358953).

Almost surely, 2^221435134 is an apocalyptic number.

221435134 is a deficient number, since it is larger than the sum of its proper divisors (120308114).

221435134 is a wasteful number, since it uses less digits than its factorization.

221435134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22779.

The product of its digits is 2880, while the sum is 25.

The square root of 221435134 is about 14880.6966906795. The cubic root of 221435134 is about 604.9909012133.

Adding to 221435134 its reverse (431534122), we get a palindrome (652969256).

The spelling of 221435134 in words is "two hundred twenty-one million, four hundred thirty-five thousand, one hundred thirty-four".