223508813 has 8 divisors (see below), whose sum is σ = 244072416. Its totient is φ = 202986000.

The previous prime is 223508801. The next prime is 223508827. The reversal of 223508813 is 318805322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223508813 - 2¹² = 223504717 is a prime.

It is a super-3 number, since 3×223508813³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223508813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223508833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1895 + ... + 21227.

It is an arithmetic number, because the mean of its divisors is an integer number (30509052).

Almost surely, 2^223508813 is an apocalyptic number.

It is an amenable number.

223508813 is a deficient number, since it is larger than the sum of its proper divisors (20563603).

223508813 is a wasteful number, since it uses less digits than its factorization.

223508813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20395.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 223508813 is about 14950.2111356328. The cubic root of 223508813 is about 606.8735608727.

The spelling of 223508813 in words is "two hundred twenty-three million, five hundred eight thousand, eight hundred thirteen".