40131233 has 2 divisors, whose sum is σ = 40131234. Its totient is φ = 40131232.

The previous prime is 40131227. The next prime is 40131253. The reversal of 40131233 is 33213104.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23541904 + 16589329 = 4852^2 + 4073^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40131233 is a prime.

It is a super-2 number, since 2×40131233² = 3221031724200578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40131253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20065616 + 20065617.

It is an arithmetic number, because the mean of its divisors is an integer number (20065617).

Almost surely, 2^40131233 is an apocalyptic number.

It is an amenable number.

40131233 is a deficient number, since it is larger than the sum of its proper divisors (1).

40131233 is an equidigital number, since it uses as much as digits as its factorization.

40131233 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 40131233 is about 6334.9217043307. The cubic root of 40131233 is about 342.3687898491.

Adding to 40131233 its reverse (33213104), we get a palindrome (73344337).

The spelling of 40131233 in words is "forty million, one hundred thirty-one thousand, two hundred thirty-three".