40231143 has 12 divisors (see below), whose sum is σ = 58409208. Its totient is φ = 26683440.

The previous prime is 40231133. The next prime is 40231153. The reversal of 40231143 is 34113204.

It is an interprime number because it is at equal distance from previous prime (40231133) and next prime (40231153).

It is not a de Polignac number, because 40231143 - 2⁵ = 40231111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40231133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9573 + ... + 13118.

It is an arithmetic number, because the mean of its divisors is an integer number (4867434).

Almost surely, 2^40231143 is an apocalyptic number.

40231143 is a deficient number, since it is larger than the sum of its proper divisors (18178065).

40231143 is a wasteful number, since it uses less digits than its factorization.

40231143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22894 (or 22891 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40231143 is about 6342.8024563280. The cubic root of 40231143 is about 342.6526728015.

Adding to 40231143 its reverse (34113204), we get a palindrome (74344347).

The spelling of 40231143 in words is "forty million, two hundred thirty-one thousand, one hundred forty-three".