40535521 has 8 divisors (see below), whose sum is σ = 43704360. Its totient is φ = 37373952.

The previous prime is 40535503. The next prime is 40535527. The reversal of 40535521 is 12553504.

It can be written as a sum of positive squares in 4 ways, for example, as 1784896 + 38750625 = 1336^2 + 6225^2 .

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 40535521 - 2⁵ = 40535489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40535527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17211 + ... + 19423.

It is an arithmetic number, because the mean of its divisors is an integer number (5463045).

Almost surely, 2^40535521 is an apocalyptic number.

It is an amenable number.

40535521 is a deficient number, since it is larger than the sum of its proper divisors (3168839).

40535521 is a wasteful number, since it uses less digits than its factorization.

40535521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 40535521 is about 6366.7512123531. The cubic root of 40535521 is about 343.5146419336.

The spelling of 40535521 in words is "forty million, five hundred thirty-five thousand, five hundred twenty-one".