72374272221 has 8 divisors (see below), whose sum is σ = 96649576704. Its totient is φ = 48174241280.

The previous prime is 72374272147. The next prime is 72374272231. The reversal of 72374272221 is 12227247327.

It is a happy number.

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 72374272221 - 2⁷ = 72374272093 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72374272221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72374272231) 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, 18816141 + ... + 18819986.

It is an arithmetic number, because the mean of its divisors is an integer number (12081197088).

Almost surely, 2^72374272221 is an apocalyptic number.

It is an amenable number.

72374272221 is a deficient number, since it is larger than the sum of its proper divisors (24275304483).

72374272221 is a wasteful number, since it uses less digits than its factorization.

72374272221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37636771.

The product of its digits is 131712, while the sum is 39.

The spelling of 72374272221 in words is "seventy-two billion, three hundred seventy-four million, two hundred seventy-two thousand, two hundred twenty-one".