40142811 has 4 divisors (see below), whose sum is σ = 53523752. Its totient is φ = 26761872.

The previous prime is 40142803. The next prime is 40142821. The reversal of 40142811 is 11824104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40142811 - 2³ = 40142803 is a prime.

It is a super-2 number, since 2×40142811² = 3222890549963442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40142821) 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, 6690466 + ... + 6690471.

It is an arithmetic number, because the mean of its divisors is an integer number (13380938).

Almost surely, 2^40142811 is an apocalyptic number.

40142811 is a deficient number, since it is larger than the sum of its proper divisors (13380941).

40142811 is a wasteful number, since it uses less digits than its factorization.

40142811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13380940.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 40142811 is about 6335.8354618787. The cubic root of 40142811 is about 342.4017115447.

Adding to 40142811 its reverse (11824104), we get a palindrome (51966915).

The spelling of 40142811 in words is "forty million, one hundred forty-two thousand, eight hundred eleven".