40223165 has 4 divisors (see below), whose sum is σ = 48267804. Its totient is φ = 32178528.

The previous prime is 40223153. The next prime is 40223233. The reversal of 40223165 is 56132204.

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 13741849 + 26481316 = 3707^2 + 5146^2 .

It is a cyclic number.

It is not a de Polignac number, because 40223165 - 2¹⁰ = 40222141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40223165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4022312 + ... + 4022321.

It is an arithmetic number, because the mean of its divisors is an integer number (12066951).

Almost surely, 2^40223165 is an apocalyptic number.

It is an amenable number.

40223165 is a deficient number, since it is larger than the sum of its proper divisors (8044639).

40223165 is an equidigital number, since it uses as much as digits as its factorization.

40223165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8044638.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40223165 is about 6342.1735233278. The cubic root of 40223165 is about 342.6300214959.

Adding to 40223165 its reverse (56132204), we get a palindrome (96355369).

The spelling of 40223165 in words is "forty million, two hundred twenty-three thousand, one hundred sixty-five".