40131020115 has 24 divisors (see below), whose sum is σ = 70091440848. Its totient is φ = 21239824320.

The previous prime is 40131020071. The next prime is 40131020117. The reversal of 40131020115 is 51102013104.

It is not a de Polignac number, because 40131020115 - 2²⁷ = 39996802387 is a prime.

It is a super-2 number, since 2×40131020115² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40131020117) 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, 3397924 + ... + 3409713.

It is an arithmetic number, because the mean of its divisors is an integer number (2920476702).

Almost surely, 2^40131020115 is an apocalyptic number.

40131020115 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40131020115 is a deficient number, since it is larger than the sum of its proper divisors (29960420733).

40131020115 is a wasteful number, since it uses less digits than its factorization.

40131020115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6807779 (or 6807776 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 40131020115 its reverse (51102013104), we get a palindrome (91233033219).

The spelling of 40131020115 in words is "forty billion, one hundred thirty-one million, twenty thousand, one hundred fifteen".