223686745 has 4 divisors (see below), whose sum is σ = 268424100. Its totient is φ = 178949392.

The previous prime is 223686737. The next prime is 223686761. The reversal of 223686745 is 547686322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547686322 = 2 ⋅273843161.

It can be written as a sum of positive squares in 2 ways, for example, as 71978256 + 151708489 = 8484^2 + 12317^2 .

It is a cyclic number.

It is not a de Polignac number, because 223686745 - 2³ = 223686737 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22368670 + ... + 22368679.

It is an arithmetic number, because the mean of its divisors is an integer number (67106025).

Almost surely, 2^223686745 is an apocalyptic number.

It is an amenable number.

223686745 is a deficient number, since it is larger than the sum of its proper divisors (44737355).

223686745 is an equidigital number, since it uses as much as digits as its factorization.

223686745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44737354.

The product of its digits is 483840, while the sum is 43.

The square root of 223686745 is about 14956.1607707326. The cubic root of 223686745 is about 607.0345591249.

The spelling of 223686745 in words is "two hundred twenty-three million, six hundred eighty-six thousand, seven hundred forty-five".