40631143 has 24 divisors (see below), whose sum is σ = 49367472. Its totient is φ = 33312384.

The previous prime is 40631137. The next prime is 40631183. The reversal of 40631143 is 34113604.

It is not a de Polignac number, because 40631143 - 2¹⁷ = 40500071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40631113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132196 + ... + 132502.

It is an arithmetic number, because the mean of its divisors is an integer number (2056978).

Almost surely, 2^40631143 is an apocalyptic number.

40631143 is a deficient number, since it is larger than the sum of its proper divisors (8736329).

40631143 is a wasteful number, since it uses less digits than its factorization.

40631143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40631143 is about 6374.2562703424. The cubic root of 40631143 is about 343.7845431733.

Adding to 40631143 its reverse (34113604), we get a palindrome (74744747).

The spelling of 40631143 in words is "forty million, six hundred thirty-one thousand, one hundred forty-three".