40143131 has 4 divisors (see below), whose sum is σ = 45877872. Its totient is φ = 34408392.

The previous prime is 40143127. The next prime is 40143149. The reversal of 40143131 is 13134104.

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 40143131 - 2² = 40143127 is a prime.

It is a super-2 number, since 2×40143131² = 3222941932966322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40143161) 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 3 ways as a sum of consecutive naturals, for example, 2867360 + ... + 2867373.

It is an arithmetic number, because the mean of its divisors is an integer number (11469468).

Almost surely, 2^40143131 is an apocalyptic number.

40143131 is a deficient number, since it is larger than the sum of its proper divisors (5734741).

40143131 is an equidigital number, since it uses as much as digits as its factorization.

40143131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5734740.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 40143131 is about 6335.8607150094. The cubic root of 40143131 is about 342.4026213652.

Adding to 40143131 its reverse (13134104), we get a palindrome (53277235).

The spelling of 40143131 in words is "forty million, one hundred forty-three thousand, one hundred thirty-one".