221434043 has 4 divisors (see below), whose sum is σ = 221586048. Its totient is φ = 221282040.

The previous prime is 221434007. The next prime is 221434049. The reversal of 221434043 is 340434122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221434043 - 2⁸ = 221433787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221434049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73796 + ... + 76737.

It is an arithmetic number, because the mean of its divisors is an integer number (55396512).

Almost surely, 2^221434043 is an apocalyptic number.

221434043 is a deficient number, since it is larger than the sum of its proper divisors (152005).

221434043 is a wasteful number, since it uses less digits than its factorization.

221434043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152004.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 221434043 is about 14880.6600324045. The cubic root of 221434043 is about 604.9899076248.

Adding to 221434043 its reverse (340434122), we get a palindrome (561868165).

The spelling of 221434043 in words is "two hundred twenty-one million, four hundred thirty-four thousand, forty-three".