40311223 has 4 divisors (see below), whose sum is σ = 40399128. Its totient is φ = 40223320.

The previous prime is 40311211. The next prime is 40311239. The reversal of 40311223 is 32211304.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40311223 - 2¹³ = 40303031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40311197 and 40311206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40311263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43261 + ... + 44182.

It is an arithmetic number, because the mean of its divisors is an integer number (10099782).

Almost surely, 2^40311223 is an apocalyptic number.

40311223 is a deficient number, since it is larger than the sum of its proper divisors (87905).

40311223 is an equidigital number, since it uses as much as digits as its factorization.

40311223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87904.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40311223 is about 6349.1119851519. Note that the first 3 decimals coincide. The cubic root of 40311223 is about 342.8798719142.

Adding to 40311223 its reverse (32211304), we get a palindrome (72522527).

The spelling of 40311223 in words is "forty million, three hundred eleven thousand, two hundred twenty-three".