40115331 has 20 divisors (see below), whose sum is σ = 60693600. Its totient is φ = 26400816.

The previous prime is 40115303. The next prime is 40115347. The reversal of 40115331 is 13351104.

It is not a de Polignac number, because 40115331 - 2⁶ = 40115267 is a prime.

It is a super-2 number, since 2×40115331² = 3218479562479122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40115351) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3265 + ... + 9533.

It is an arithmetic number, because the mean of its divisors is an integer number (3034680).

Almost surely, 2^40115331 is an apocalyptic number.

40115331 is a deficient number, since it is larger than the sum of its proper divisors (20578269).

40115331 is an equidigital number, since it uses as much as digits as its factorization.

40115331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360 (or 6351 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 40115331 is about 6333.6664736944. Note that the first 3 decimals coincide. The cubic root of 40115331 is about 342.3235626669.

Adding to 40115331 its reverse (13351104), we get a palindrome (53466435).

The spelling of 40115331 in words is "forty million, one hundred fifteen thousand, three hundred thirty-one".