40131087187 has 4 divisors (see below), whose sum is σ = 40437431496. Its totient is φ = 39824742880.

The previous prime is 40131087151. The next prime is 40131087211. The reversal of 40131087187 is 78178013104.

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 40131087187 - 2²³ = 40122698579 is a prime.

It is a super-2 number, since 2×40131087187² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40131085187) 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, 153171958 + ... + 153172219.

It is an arithmetic number, because the mean of its divisors is an integer number (10109357874).

Almost surely, 2^40131087187 is an apocalyptic number.

40131087187 is a deficient number, since it is larger than the sum of its proper divisors (306344309).

40131087187 is a wasteful number, since it uses less digits than its factorization.

40131087187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306344308.

The product of its (nonzero) digits is 37632, while the sum is 40.

The spelling of 40131087187 in words is "forty billion, one hundred thirty-one million, eighty-seven thousand, one hundred eighty-seven".