221330131 has 8 divisors (see below), whose sum is σ = 241735104. Its totient is φ = 200972520.

The previous prime is 221330129. The next prime is 221330141. The reversal of 221330131 is 131033122.

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 221330131 - 2¹ = 221330129 is a prime.

It is a super-2 number, since 2×221330131² = 97974053776954322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221330141) 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, 1681 + ... + 21106.

It is an arithmetic number, because the mean of its divisors is an integer number (30216888).

Almost surely, 2^221330131 is an apocalyptic number.

221330131 is a deficient number, since it is larger than the sum of its proper divisors (20404973).

221330131 is a wasteful number, since it uses less digits than its factorization.

221330131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23681.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 221330131 is about 14877.1681109007. The cubic root of 221330131 is about 604.8952586018.

Adding to 221330131 its reverse (131033122), we get a palindrome (352363253).

The spelling of 221330131 in words is "two hundred twenty-one million, three hundred thirty thousand, one hundred thirty-one".