72312221327 has 4 divisors (see below), whose sum is σ = 72593592096. Its totient is φ = 72030850560.

The previous prime is 72312221323. The next prime is 72312221339.

72312221327 is nontrivially palindromic in base 10.

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 72312221327 - 2² = 72312221323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72312221293 and 72312221302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72312221323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140684999 + ... + 140685512.

It is an arithmetic number, because the mean of its divisors is an integer number (18148398024).

Almost surely, 2^72312221327 is an apocalyptic number.

72312221327 is a deficient number, since it is larger than the sum of its proper divisors (281370769).

72312221327 is a wasteful number, since it uses less digits than its factorization.

72312221327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281370768.

The product of its digits is 14112, while the sum is 32.

The spelling of 72312221327 in words is "seventy-two billion, three hundred twelve million, two hundred twenty-one thousand, three hundred twenty-seven".