223021133 has 4 divisors (see below), whose sum is σ = 232717728. Its totient is φ = 213324540.

The previous prime is 223021093. The next prime is 223021151. The reversal of 223021133 is 331120322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-223021133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223021193) 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, 4848263 + ... + 4848308.

It is an arithmetic number, because the mean of its divisors is an integer number (58179432).

Almost surely, 2^223021133 is an apocalyptic number.

223021133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

223021133 is a deficient number, since it is larger than the sum of its proper divisors (9696595).

223021133 is an equidigital number, since it uses as much as digits as its factorization.

223021133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9696594.

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

The square root of 223021133 is about 14933.8920914810. The cubic root of 223021133 is about 606.4318547792.

Adding to 223021133 its reverse (331120322), we get a palindrome (554141455).

The spelling of 223021133 in words is "two hundred twenty-three million, twenty-one thousand, one hundred thirty-three".