221513133 has 8 divisors (see below), whose sum is σ = 296228608. Its totient is φ = 147236544.

The previous prime is 221513093. The next prime is 221513147. The reversal of 221513133 is 331315122.

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

It is not a de Polignac number, because 221513133 - 2⁸ = 221512877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221513233) 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 7 ways as a sum of consecutive naturals, for example, 108541 + ... + 110562.

It is an arithmetic number, because the mean of its divisors is an integer number (37028576).

Almost surely, 2^221513133 is an apocalyptic number.

It is an amenable number.

221513133 is a deficient number, since it is larger than the sum of its proper divisors (74715475).

221513133 is a wasteful number, since it uses less digits than its factorization.

221513133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219443.

The product of its digits is 540, while the sum is 21.

The square root of 221513133 is about 14883.3172713612. The cubic root of 221513133 is about 605.0619274997.

Adding to 221513133 its reverse (331315122), we get a palindrome (552828255).

The spelling of 221513133 in words is "two hundred twenty-one million, five hundred thirteen thousand, one hundred thirty-three".