223544645 has 16 divisors (see below), whose sum is σ = 284398128. Its totient is φ = 168099840.

The previous prime is 223544609. The next prime is 223544677. The reversal of 223544645 is 546445322.

It can be written as a sum of positive squares in 8 ways, for example, as 729316 + 222815329 = 854^2 + 14927^2 .

It is not a de Polignac number, because 223544645 - 2⁸ = 223544389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102365 + ... + 104525.

It is an arithmetic number, because the mean of its divisors is an integer number (17774883).

Almost surely, 2^223544645 is an apocalyptic number.

It is an amenable number.

223544645 is a deficient number, since it is larger than the sum of its proper divisors (60853483).

223544645 is a wasteful number, since it uses less digits than its factorization.

223544645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400.

The product of its digits is 115200, while the sum is 35.

The square root of 223544645 is about 14951.4094653314. The cubic root of 223544645 is about 606.9059896186.

Adding to 223544645 its reverse (546445322), we get a palindrome (769989967).

The spelling of 223544645 in words is "two hundred twenty-three million, five hundred forty-four thousand, six hundred forty-five".