221043131 has 8 divisors (see below), whose sum is σ = 233195280. Its totient is φ = 208942848.

The previous prime is 221043127. The next prime is 221043181. The reversal of 221043131 is 131340122.

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

It is not a de Polignac number, because 221043131 - 2² = 221043127 is a prime.

It is a super-2 number, since 2×221043131² = 97720131524566322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221043101) 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, 4046 + ... + 21411.

It is an arithmetic number, because the mean of its divisors is an integer number (29149410).

Almost surely, 2^221043131 is an apocalyptic number.

221043131 is a deficient number, since it is larger than the sum of its proper divisors (12152149).

221043131 is a wasteful number, since it uses less digits than its factorization.

221043131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25933.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 221043131 is about 14867.5193290609. The cubic root of 221043131 is about 604.6336885049.

Adding to 221043131 its reverse (131340122), we get a palindrome (352383253).

The spelling of 221043131 in words is "two hundred twenty-one million, forty-three thousand, one hundred thirty-one".