40131263 has 4 divisors (see below), whose sum is σ = 40355640. Its totient is φ = 39906888.

The previous prime is 40131253. The next prime is 40131281. The reversal of 40131263 is 36213104.

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 40131263 - 2¹² = 40127167 is a prime.

It is a super-2 number, since 2×40131263² = 3221036539950338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40131233) 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, 111920 + ... + 112277.

It is an arithmetic number, because the mean of its divisors is an integer number (10088910).

Almost surely, 2^40131263 is an apocalyptic number.

40131263 is a deficient number, since it is larger than the sum of its proper divisors (224377).

40131263 is a wasteful number, since it uses less digits than its factorization.

40131263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224376.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40131263 is about 6334.9240721575. The cubic root of 40131263 is about 342.3688751614.

Adding to 40131263 its reverse (36213104), we get a palindrome (76344367).

The spelling of 40131263 in words is "forty million, one hundred thirty-one thousand, two hundred sixty-three".