2223524021 has 4 divisors (see below), whose sum is σ = 2229895500. Its totient is φ = 2217152544.

The previous prime is 2223523997. The next prime is 2223524029. The reversal of 2223524021 is 1204253222.

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 613107121 + 1610416900 = 24761^2 + 40130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2223524021 - 2⁶ = 2223523957 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 (2223524029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3185216 + ... + 3185913.

It is an arithmetic number, because the mean of its divisors is an integer number (557473875).

Almost surely, 2^2223524021 is an apocalyptic number.

It is an amenable number.

2223524021 is a deficient number, since it is larger than the sum of its proper divisors (6371479).

2223524021 is an equidigital number, since it uses as much as digits as its factorization.

2223524021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371478.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2223524021 is about 47154.2577186833. The cubic root of 2223524021 is about 1305.2106491430.

Adding to 2223524021 its reverse (1204253222), we get a palindrome (3427777243).

The spelling of 2223524021 in words is "two billion, two hundred twenty-three million, five hundred twenty-four thousand, twenty-one".