40131323 has 2 divisors, whose sum is σ = 40131324. Its totient is φ = 40131322.

The previous prime is 40131319. The next prime is 40131337. The reversal of 40131323 is 32313104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40131323 - 2² = 40131319 is a prime.

It is a super-2 number, since 2×40131323² = 3221046171460658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40131023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20065661 + 20065662.

It is an arithmetic number, because the mean of its divisors is an integer number (20065662).

Almost surely, 2^40131323 is an apocalyptic number.

40131323 is a deficient number, since it is larger than the sum of its proper divisors (1).

40131323 is an equidigital number, since it uses as much as digits as its factorization.

40131323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 40131323 is about 6334.9288078083. The cubic root of 40131323 is about 342.3690457858.

Adding to 40131323 its reverse (32313104), we get a palindrome (72444427).

The spelling of 40131323 in words is "forty million, one hundred thirty-one thousand, three hundred twenty-three".