40143111 has 4 divisors (see below), whose sum is σ = 53524152. Its totient is φ = 26762072.

The previous prime is 40143107. The next prime is 40143127. The reversal of 40143111 is 11134104.

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 40143111 - 2² = 40143107 is a prime.

It is a super-2 number, since 2×40143111² = 3222938721516642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40143161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6690516 + ... + 6690521.

It is an arithmetic number, because the mean of its divisors is an integer number (13381038).

Almost surely, 2^40143111 is an apocalyptic number.

40143111 is a deficient number, since it is larger than the sum of its proper divisors (13381041).

40143111 is a wasteful number, since it uses less digits than its factorization.

40143111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13381040.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 40143111 is about 6335.8591366917. The cubic root of 40143111 is about 342.4025645015.

Adding to 40143111 its reverse (11134104), we get a palindrome (51277215).

The spelling of 40143111 in words is "forty million, one hundred forty-three thousand, one hundred eleven".