40131223 has 6 divisors (see below), whose sum is σ = 44111312. Its totient is φ = 36482820.

The previous prime is 40131209. The next prime is 40131227. The reversal of 40131223 is 32213104.

It is a happy number.

40131223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40131223 - 2²¹ = 38034071 is a prime.

It is a super-2 number, since 2×40131223² = 3221030118951458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40131197 and 40131206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40131227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165711 + ... + 165952.

Almost surely, 2^40131223 is an apocalyptic number.

40131223 is a deficient number, since it is larger than the sum of its proper divisors (3980089).

40131223 is a wasteful number, since it uses less digits than its factorization.

40131223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331685 (or 331674 counting only the distinct ones).

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

The square root of 40131223 is about 6334.9209150549. The cubic root of 40131223 is about 342.3687614117.

Adding to 40131223 its reverse (32213104), we get a palindrome (72344327).

The spelling of 40131223 in words is "forty million, one hundred thirty-one thousand, two hundred twenty-three".