221324033 has 6 divisors (see below), whose sum is σ = 257458626. Its totient is φ = 189706272.

The previous prime is 221324023. The next prime is 221324057. The reversal of 221324033 is 330423122.

It can be written as a sum of positive squares in only one way, i.e., 119858704 + 101465329 = 10948^2 + 10073^2 .

It is not a de Polignac number, because 221324033 - 2⁸ = 221323777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221323996 and 221324014.

It is not an unprimeable number, because it can be changed into a prime (221324023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2258360 + ... + 2258457.

It is an arithmetic number, because the mean of its divisors is an integer number (42909771).

Almost surely, 2^221324033 is an apocalyptic number.

It is an amenable number.

221324033 is a deficient number, since it is larger than the sum of its proper divisors (36134593).

221324033 is an equidigital number, since it uses as much as digits as its factorization.

221324033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4516831 (or 4516824 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 221324033 is about 14876.9631645709. The cubic root of 221324033 is about 604.8897032727.

Adding to 221324033 its reverse (330423122), we get a palindrome (551747155).

The spelling of 221324033 in words is "two hundred twenty-one million, three hundred twenty-four thousand, thirty-three".