221013043 has 4 divisors (see below), whose sum is σ = 228142528. Its totient is φ = 213883560.

The previous prime is 221013029. The next prime is 221013047. The reversal of 221013043 is 340310122.

It is a happy number.

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 221013043 - 2⁵ = 221013011 is a prime.

It is a super-2 number, since 2×221013043² = 97693530352239698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221013047) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3564696 + ... + 3564757.

It is an arithmetic number, because the mean of its divisors is an integer number (57035632).

Almost surely, 2^221013043 is an apocalyptic number.

221013043 is a deficient number, since it is larger than the sum of its proper divisors (7129485).

221013043 is an equidigital number, since it uses as much as digits as its factorization.

221013043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7129484.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221013043 is about 14866.5074244087. The cubic root of 221013043 is about 604.6062533706.

Adding to 221013043 its reverse (340310122), we get a palindrome (561323165).

The spelling of 221013043 in words is "two hundred twenty-one million, thirteen thousand, forty-three".