220021433 has 4 divisors (see below), whose sum is σ = 220069668. Its totient is φ = 219973200.

The previous prime is 220021409. The next prime is 220021441. The reversal of 220021433 is 334120022.

220021433 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.

It can be written as a sum of positive squares in 2 ways, for example, as 13897984 + 206123449 = 3728^2 + 14357^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021433 - 2⁸ = 220021177 is a prime.

It is a super-3 number, since 3×220021433³ (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 (220020433) 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, 16466 + ... + 26667.

It is an arithmetic number, because the mean of its divisors is an integer number (55017417).

Almost surely, 2^220021433 is an apocalyptic number.

It is an amenable number.

220021433 is a deficient number, since it is larger than the sum of its proper divisors (48235).

220021433 is an equidigital number, since it uses as much as digits as its factorization.

220021433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48234.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 220021433 is about 14833.1194628777. The cubic root of 220021433 is about 603.7006771287.

Adding to 220021433 its reverse (334120022), we get a palindrome (554141455).

The spelling of 220021433 in words is "two hundred twenty million, twenty-one thousand, four hundred thirty-three".