223520213 has 6 divisors (see below), whose sum is σ = 260013366. Its totient is φ = 191588712.

The previous prime is 223520189. The next prime is 223520243. The reversal of 223520213 is 312025322.

It can be written as a sum of positive squares in only one way, i.e., 132756484 + 90763729 = 11522^2 + 9527^2 .

It is not a de Polignac number, because 223520213 - 2¹⁶ = 223454677 is a prime.

It is a super-2 number, since 2×223520213² = 99922571239130738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223520243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2280770 + ... + 2280867.

It is an arithmetic number, because the mean of its divisors is an integer number (43335561).

Almost surely, 2^223520213 is an apocalyptic number.

It is an amenable number.

223520213 is a deficient number, since it is larger than the sum of its proper divisors (36493153).

223520213 is an equidigital number, since it uses as much as digits as its factorization.

223520213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4561651 (or 4561644 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 223520213 is about 14950.5923962899. The cubic root of 223520213 is about 606.8838784986.

Adding to 223520213 its reverse (312025322), we get a palindrome (535545535).

The spelling of 223520213 in words is "two hundred twenty-three million, five hundred twenty thousand, two hundred thirteen".