223812109 has 4 divisors (see below), whose sum is σ = 223842816. Its totient is φ = 223781404.

The previous prime is 223812091. The next prime is 223812143. The reversal of 223812109 is 901218322.

223812109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 223812109 - 2¹³ = 223803917 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 (223812209) 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, 2502 + ... + 21304.

It is an arithmetic number, because the mean of its divisors is an integer number (55960704).

Almost surely, 2^223812109 is an apocalyptic number.

It is an amenable number.

223812109 is a deficient number, since it is larger than the sum of its proper divisors (30707).

223812109 is a wasteful number, since it uses less digits than its factorization.

223812109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30706.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 223812109 is about 14960.3512325079. The cubic root of 223812109 is about 607.1479410008.

The spelling of 223812109 in words is "two hundred twenty-three million, eight hundred twelve thousand, one hundred nine".