221426033 has 4 divisors (see below), whose sum is σ = 222214308. Its totient is φ = 220637760.

The previous prime is 221426011. The next prime is 221426047. The reversal of 221426033 is 330624122.

221426033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 330624122 = 2 ⋅165312061.

It can be written as a sum of positive squares in 2 ways, for example, as 52243984 + 169182049 = 7228^2 + 13007^2 .

It is a cyclic number.

It is not a de Polignac number, because 221426033 - 2¹⁶ = 221360497 is a prime.

It is a super-3 number, since 3×221426033³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221426053) 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, 393716 + ... + 394277.

It is an arithmetic number, because the mean of its divisors is an integer number (55553577).

Almost surely, 2^221426033 is an apocalyptic number.

It is an amenable number.

221426033 is a deficient number, since it is larger than the sum of its proper divisors (788275).

221426033 is an equidigital number, since it uses as much as digits as its factorization.

221426033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788274.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 221426033 is about 14880.3908886830. The cubic root of 221426033 is about 604.9826127098.

The spelling of 221426033 in words is "two hundred twenty-one million, four hundred twenty-six thousand, thirty-three".