223630042565 has 4 divisors (see below), whose sum is σ = 268356051084. Its totient is φ = 178904034048.

The previous prime is 223630042499. The next prime is 223630042577. The reversal of 223630042565 is 565240036322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 99583793761 + 124046248804 = 315569^2 + 352202^2 .

It is a cyclic number.

It is not a de Polignac number, because 223630042565 - 2¹⁴ = 223630026181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22363004252 + ... + 22363004261.

It is an arithmetic number, because the mean of its divisors is an integer number (67089012771).

Almost surely, 2^223630042565 is an apocalyptic number.

It is an amenable number.

223630042565 is a deficient number, since it is larger than the sum of its proper divisors (44726008519).

223630042565 is an equidigital number, since it uses as much as digits as its factorization.

223630042565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44726008518.

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 223630042565 its reverse (565240036322), we get a palindrome (788870078887).

The spelling of 223630042565 in words is "two hundred twenty-three billion, six hundred thirty million, forty-two thousand, five hundred sixty-five".