40045131 has 16 divisors (see below), whose sum is σ = 67801600. Its totient is φ = 22882824.

The previous prime is 40045127. The next prime is 40045133. The reversal of 40045131 is 13154004.

It is a happy number.

It is not a de Polignac number, because 40045131 - 2² = 40045127 is a prime.

It is a super-2 number, since 2×40045131² = 3207225033614322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40045133) 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 in 15 ways as a sum of consecutive naturals, for example, 105751 + ... + 106128.

It is an arithmetic number, because the mean of its divisors is an integer number (4237600).

Almost surely, 2^40045131 is an apocalyptic number.

40045131 is a deficient number, since it is larger than the sum of its proper divisors (27756469).

40045131 is a wasteful number, since it uses less digits than its factorization.

40045131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211895 (or 211889 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 40045131 is about 6328.1222333327. The cubic root of 40045131 is about 342.1237625329.

Adding to 40045131 its reverse (13154004), we get a palindrome (53199135).

The spelling of 40045131 in words is "forty million, forty-five thousand, one hundred thirty-one".