72222009 has 8 divisors (see below), whose sum is σ = 96399072. Its totient is φ = 48096480.

The previous prime is 72221953. The next prime is 72222011. The reversal of 72222009 is 90022227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72222009 - 2⁸ = 72221753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72222009.

It is not an unprimeable number, because it can be changed into a prime (72222019) 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, 9484 + ... + 15309.

It is an arithmetic number, because the mean of its divisors is an integer number (12049884).

Almost surely, 2^72222009 is an apocalyptic number.

It is an amenable number.

72222009 is a deficient number, since it is larger than the sum of its proper divisors (24177063).

72222009 is a wasteful number, since it uses less digits than its factorization.

72222009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25767.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 72222009 is about 8498.3533110833. The cubic root of 72222009 is about 416.4439159961.

The spelling of 72222009 in words is "seventy-two million, two hundred twenty-two thousand, nine".