40533209 has 4 divisors (see below), whose sum is σ = 40649700. Its totient is φ = 40416720.

The previous prime is 40533203. The next prime is 40533211. The reversal of 40533209 is 90233504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18705625 + 21827584 = 4325^2 + 4672^2 .

It is a cyclic number.

It is not a de Polignac number, because 40533209 - 2⁸ = 40532953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40533203) 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, 57722 + ... + 58419.

It is an arithmetic number, because the mean of its divisors is an integer number (10162425).

Almost surely, 2^40533209 is an apocalyptic number.

It is an amenable number.

40533209 is a deficient number, since it is larger than the sum of its proper divisors (116491).

40533209 is a wasteful number, since it uses less digits than its factorization.

40533209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116490.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 40533209 is about 6366.5696414945. The cubic root of 40533209 is about 343.5081108638.

The spelling of 40533209 in words is "forty million, five hundred thirty-three thousand, two hundred nine".