40221633209 has 4 divisors (see below), whose sum is σ = 41519105280. Its totient is φ = 38924161140.

The previous prime is 40221633187. The next prime is 40221633211. The reversal of 40221633209 is 90233612204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40221633209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40221633289) 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, 648735989 + ... + 648736050.

It is an arithmetic number, because the mean of its divisors is an integer number (10379776320).

Almost surely, 2^40221633209 is an apocalyptic number.

It is an amenable number.

40221633209 is a deficient number, since it is larger than the sum of its proper divisors (1297472071).

40221633209 is a wasteful number, since it uses less digits than its factorization.

40221633209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297472070.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 40221633209 in words is "forty billion, two hundred twenty-one million, six hundred thirty-three thousand, two hundred nine".