40105143 has 24 divisors (see below), whose sum is σ = 65672880. Its totient is φ = 23379840.

The previous prime is 40105141. The next prime is 40105157. The reversal of 40105143 is 34150104.

It is a happy number.

It is not a de Polignac number, because 40105143 - 2¹ = 40105141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40105141) 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, 6798 + ... + 11243.

It is an arithmetic number, because the mean of its divisors is an integer number (2736370).

Almost surely, 2^40105143 is an apocalyptic number.

40105143 is a deficient number, since it is larger than the sum of its proper divisors (25567737).

40105143 is a wasteful number, since it uses less digits than its factorization.

40105143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18079 (or 18076 counting only the distinct ones).

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

The square root of 40105143 is about 6332.8621491392. The cubic root of 40105143 is about 342.2945804993.

Adding to 40105143 its reverse (34150104), we get a palindrome (74255247).

The spelling of 40105143 in words is "forty million, one hundred five thousand, one hundred forty-three".