223340440465 has 8 divisors (see below), whose sum is σ = 269557711848. Its totient is φ = 177639563520.

The previous prime is 223340440397. The next prime is 223340440481. The reversal of 223340440465 is 564044043322.

It can be written as a sum of positive squares in 4 ways, for example, as 117061832449 + 106278608016 = 342143^2 + 326004^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 223340440465 - 2²⁷ = 223206222737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129097656 + ... + 129099385.

It is an arithmetic number, because the mean of its divisors is an integer number (33694713981).

Almost surely, 2^223340440465 is an apocalyptic number.

It is an amenable number.

223340440465 is a deficient number, since it is larger than the sum of its proper divisors (46217271383).

223340440465 is a wasteful number, since it uses less digits than its factorization.

223340440465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258197219.

The product of its (nonzero) digits is 276480, while the sum is 37.

Adding to 223340440465 its reverse (564044043322), we get a palindrome (787384483787).

The spelling of 223340440465 in words is "two hundred twenty-three billion, three hundred forty million, four hundred forty thousand, four hundred sixty-five".