223240545 has 24 divisors (see below), whose sum is σ = 422128512. Its totient is φ = 108237600.

The previous prime is 223240489. The next prime is 223240571. The reversal of 223240545 is 545042322.

It is a happy number.

It is not a de Polignac number, because 223240545 - 2⁷ = 223240417 is a prime.

It is a super-3 number, since 3×223240545³ (a number of 26 digits) contains 333 as substring.

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 23 ways as a sum of consecutive naturals, for example, 225001 + ... + 225990.

It is an arithmetic number, because the mean of its divisors is an integer number (17588688).

Almost surely, 2^223240545 is an apocalyptic number.

It is an amenable number.

223240545 is a deficient number, since it is larger than the sum of its proper divisors (198887967).

223240545 is a wasteful number, since it uses less digits than its factorization.

223240545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451013 (or 451010 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 223240545 is about 14941.2363946228. The cubic root of 223240545 is about 606.6306622691.

Adding to 223240545 its reverse (545042322), we get a palindrome (768282867).

It can be divided in two parts, 2232405 and 45, that multiplied together give a triangular number (100458225 = T₁₄₁₇₄).

The spelling of 223240545 in words is "two hundred twenty-three million, two hundred forty thousand, five hundred forty-five".