40915915 has 8 divisors (see below), whose sum is σ = 49349520. Its totient is φ = 32565792.

The previous prime is 40915913. The next prime is 40915921. The reversal of 40915915 is 51951904.

It is a happy number.

40915915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40915915 - 2¹ = 40915913 is a prime.

It is a super-2 number, since 2×40915915² = 3348224200574450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40915913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19785 + ... + 21754.

It is an arithmetic number, because the mean of its divisors is an integer number (6168690).

Almost surely, 2^40915915 is an apocalyptic number.

40915915 is a deficient number, since it is larger than the sum of its proper divisors (8433605).

40915915 is a wasteful number, since it uses less digits than its factorization.

40915915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41741.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 40915915 is about 6396.5549321490. The cubic root of 40915915 is about 344.5858364096.

The spelling of 40915915 in words is "forty million, nine hundred fifteen thousand, nine hundred fifteen".