40913521 has 8 divisors (see below), whose sum is σ = 46073088. Its totient is φ = 35994000.

The previous prime is 40913513. The next prime is 40913549. The reversal of 40913521 is 12531904.

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 40913521 - 2³ = 40913513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40913501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59650 + ... + 60331.

It is an arithmetic number, because the mean of its divisors is an integer number (5759136).

Almost surely, 2^40913521 is an apocalyptic number.

It is an amenable number.

40913521 is a deficient number, since it is larger than the sum of its proper divisors (5159567).

40913521 is a wasteful number, since it uses less digits than its factorization.

40913521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120023.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 40913521 is about 6396.3677974300. The cubic root of 40913521 is about 344.5791156786.

The spelling of 40913521 in words is "forty million, nine hundred thirteen thousand, five hundred twenty-one".