220303231 has 4 divisors (see below), whose sum is σ = 220378264. Its totient is φ = 220228200.

The previous prime is 220303219. The next prime is 220303249. The reversal of 220303231 is 132303022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220303231 - 2⁷ = 220303103 is a prime.

It is a super-3 number, since 3×220303231³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220303931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32925 + ... + 39046.

It is an arithmetic number, because the mean of its divisors is an integer number (55094566).

Almost surely, 2^220303231 is an apocalyptic number.

220303231 is a deficient number, since it is larger than the sum of its proper divisors (75033).

220303231 is an equidigital number, since it uses as much as digits as its factorization.

220303231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75032.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 220303231 is about 14842.6153692670. The cubic root of 220303231 is about 603.9583021300.

Adding to 220303231 its reverse (132303022), we get a palindrome (352606253).

The spelling of 220303231 in words is "two hundred twenty million, three hundred three thousand, two hundred thirty-one".