223909138 has 4 divisors (see below), whose sum is σ = 335863710. Its totient is φ = 111954568.

The previous prime is 223909111. The next prime is 223909151. The reversal of 223909138 is 831909322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 170224209 + 53684929 = 13047^2 + 7327^2 .

It is a junction number, because it is equal to n+sod(n) for n = 223909097 and 223909106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55977283 + ... + 55977286.

Almost surely, 2^223909138 is an apocalyptic number.

223909138 is a deficient number, since it is larger than the sum of its proper divisors (111954572).

223909138 is a wasteful number, since it uses less digits than its factorization.

223909138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111954571.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 223909138 is about 14963.5937528389. The cubic root of 223909138 is about 607.2356670353.

The spelling of 223909138 in words is "two hundred twenty-three million, nine hundred nine thousand, one hundred thirty-eight".