40415131 has 4 divisors (see below), whose sum is σ = 40561312. Its totient is φ = 40268952.

The previous prime is 40415099. The next prime is 40415149. The reversal of 40415131 is 13151404.

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 40415131 - 2⁵ = 40415099 is a prime.

It is a super-2 number, since 2×40415131² = 3266765627494322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40415099 and 40415108.

It is not an unprimeable number, because it can be changed into a prime (40415161) 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, 72675 + ... + 73228.

It is an arithmetic number, because the mean of its divisors is an integer number (10140328).

Almost surely, 2^40415131 is an apocalyptic number.

40415131 is a deficient number, since it is larger than the sum of its proper divisors (146181).

40415131 is a wasteful number, since it uses less digits than its factorization.

40415131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146180.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 40415131 is about 6357.2895954172. The cubic root of 40415131 is about 343.1742266105.

Adding to 40415131 its reverse (13151404), we get a palindrome (53566535).

The spelling of 40415131 in words is "forty million, four hundred fifteen thousand, one hundred thirty-one".