40131313 has 4 divisors (see below), whose sum is σ = 40506480. Its totient is φ = 39756148.

The previous prime is 40131307. The next prime is 40131317. The reversal of 40131313 is 31313104.

40131313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40131313 - 2⁵ = 40131281 is a prime.

It is a super-2 number, since 2×40131313² = 3221044566207938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40131317) 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 3 ways as a sum of consecutive naturals, for example, 187423 + ... + 187636.

It is an arithmetic number, because the mean of its divisors is an integer number (10126620).

Almost surely, 2^40131313 is an apocalyptic number.

It is an amenable number.

40131313 is a deficient number, since it is larger than the sum of its proper divisors (375167).

40131313 is a wasteful number, since it uses less digits than its factorization.

40131313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375166.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 40131313 is about 6334.9280185334. The cubic root of 40131313 is about 342.3690173484.

Adding to 40131313 its reverse (31313104), we get a palindrome (71444417).

The spelling of 40131313 in words is "forty million, one hundred thirty-one thousand, three hundred thirteen".