40131311 has 4 divisors (see below), whose sum is σ = 43779624. Its totient is φ = 36483000.

The previous prime is 40131307. The next prime is 40131317. The reversal of 40131311 is 11313104.

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 40131311 - 2² = 40131307 is a prime.

It is a super-2 number, since 2×40131311² = 3221044245157442, 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 (40131317) 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, 1824140 + ... + 1824161.

It is an arithmetic number, because the mean of its divisors is an integer number (10944906).

Almost surely, 2^40131311 is an apocalyptic number.

40131311 is a deficient number, since it is larger than the sum of its proper divisors (3648313).

40131311 is a wasteful number, since it uses less digits than its factorization.

40131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648312.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 40131311 is about 6334.9278606784. The cubic root of 40131311 is about 342.3690116610.

Adding to 40131311 its reverse (11313104), we get a palindrome (51444415).

The spelling of 40131311 in words is "forty million, one hundred thirty-one thousand, three hundred eleven".