221452133 has 4 divisors (see below), whose sum is σ = 253088160. Its totient is φ = 189816108.

The previous prime is 221452129. The next prime is 221452151. The reversal of 221452133 is 331254122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331254122 = 2 ⋅165627061.

It is a cyclic number.

It is not a de Polignac number, because 221452133 - 2² = 221452129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221452099 and 221452108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221452103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15818003 + ... + 15818016.

It is an arithmetic number, because the mean of its divisors is an integer number (63272040).

Almost surely, 2^221452133 is an apocalyptic number.

It is an amenable number.

221452133 is a deficient number, since it is larger than the sum of its proper divisors (31636027).

221452133 is an equidigital number, since it uses as much as digits as its factorization.

221452133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31636026.

The product of its digits is 1440, while the sum is 23.

The square root of 221452133 is about 14881.2678559322. The cubic root of 221452133 is about 605.0063820104.

The spelling of 221452133 in words is "two hundred twenty-one million, four hundred fifty-two thousand, one hundred thirty-three".