40522591 has 4 divisors (see below), whose sum is σ = 40881312. Its totient is φ = 40163872.

The previous prime is 40522589. The next prime is 40522597. The reversal of 40522591 is 19522504.

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 40522591 - 2¹ = 40522589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40522597) 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, 179191 + ... + 179416.

It is an arithmetic number, because the mean of its divisors is an integer number (10220328).

Almost surely, 2^40522591 is an apocalyptic number.

40522591 is a deficient number, since it is larger than the sum of its proper divisors (358721).

40522591 is a wasteful number, since it uses less digits than its factorization.

40522591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358720.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 40522591 is about 6365.7356998229. The cubic root of 40522591 is about 343.4781133404.

The spelling of 40522591 in words is "forty million, five hundred twenty-two thousand, five hundred ninety-one".