40115131 has 4 divisors (see below), whose sum is σ = 45845872. Its totient is φ = 34384392.

The previous prime is 40115093. The next prime is 40115143. The reversal of 40115131 is 13151104.

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

It is a de Polignac number, because none of the positive numbers 2^k-40115131 is a prime.

It is a super-2 number, since 2×40115131² = 3218447470294322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40115171) 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, 2865360 + ... + 2865373.

It is an arithmetic number, because the mean of its divisors is an integer number (11461468).

Almost surely, 2^40115131 is an apocalyptic number.

40115131 is a deficient number, since it is larger than the sum of its proper divisors (5730741).

40115131 is an equidigital number, since it uses as much as digits as its factorization.

40115131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730740.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 40115131 is about 6333.6506850315. The cubic root of 40115131 is about 342.3229937670.

Adding to 40115131 its reverse (13151104), we get a palindrome (53266235).

The spelling of 40115131 in words is "forty million, one hundred fifteen thousand, one hundred thirty-one".