221432134 has 32 divisors (see below), whose sum is σ = 422931456. Its totient is φ = 84433920.

The previous prime is 221432117. The next prime is 221432149. The reversal of 221432134 is 431234122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8059 + ... + 22534.

It is an arithmetic number, because the mean of its divisors is an integer number (13216608).

Almost surely, 2^221432134 is an apocalyptic number.

221432134 is a deficient number, since it is larger than the sum of its proper divisors (201499322).

221432134 is a wasteful number, since it uses less digits than its factorization.

221432134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30660.

The product of its digits is 1152, while the sum is 22.

The square root of 221432134 is about 14880.5958886061. The cubic root of 221432134 is about 604.9881690649.

Adding to 221432134 its reverse (431234122), we get a palindrome (652666256).

The spelling of 221432134 in words is "two hundred twenty-one million, four hundred thirty-two thousand, one hundred thirty-four".