221213033 has 8 divisors (see below), whose sum is σ = 223541280. Its totient is φ = 218897280.

The previous prime is 221213021. The next prime is 221213039. The reversal of 221213033 is 330312122.

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 221213033 - 2⁴ = 221213017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221213039) 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, 34841 + ... + 40697.

It is an arithmetic number, because the mean of its divisors is an integer number (27942660).

Almost surely, 2^221213033 is an apocalyptic number.

It is an amenable number.

221213033 is a deficient number, since it is larger than the sum of its proper divisors (2328247).

221213033 is a wasteful number, since it uses less digits than its factorization.

221213033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6247.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 221213033 is about 14873.2320966224. The cubic root of 221213033 is about 604.7885635036.

Adding to 221213033 its reverse (330312122), we get a palindrome (551525155).

The spelling of 221213033 in words is "two hundred twenty-one million, two hundred thirteen thousand, thirty-three".