221001043 has 8 divisors (see below), whose sum is σ = 234962208. Its totient is φ = 207402624.

The previous prime is 221001031. The next prime is 221001049. The reversal of 221001043 is 340100122.

221001043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221001043 - 2²¹ = 218903891 is a prime.

It is a super-2 number, since 2×221001043² = 97682922014175698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221001049) 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, 89430 + ... + 91867.

It is an arithmetic number, because the mean of its divisors is an integer number (29370276).

Almost surely, 2^221001043 is an apocalyptic number.

221001043 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221001043 is a deficient number, since it is larger than the sum of its proper divisors (13961165).

221001043 is a wasteful number, since it uses less digits than its factorization.

221001043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181373.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221001043 is about 14866.1038271633. The cubic root of 221001043 is about 604.5953107188.

Adding to 221001043 its reverse (340100122), we get a palindrome (561101165).

The spelling of 221001043 in words is "two hundred twenty-one million, one thousand, forty-three".