72286237321 has 3 divisors (see below), whose sum is σ = 72286506183. Its totient is φ = 72285968460.

The previous prime is 72286237313. The next prime is 72286237343. The reversal of 72286237321 is 12373268227.

The square root of 72286237321 is 268861.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 29907897721 + 42378339600 = 172939^2 + 205860^2 .

It is not a de Polignac number, because 72286237321 - 2³ = 72286237313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72286237351) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 134431 + ... + 403291.

It is an arithmetic number, because the mean of its divisors is an integer number (24095502061).

Almost surely, 2^72286237321 is an apocalyptic number.

72286237321 is the 268861-st square number.

72286237321 is the 134431-st centered octagonal number.

It is an amenable number.

72286237321 is a deficient number, since it is larger than the sum of its proper divisors (268862).

72286237321 is an frugal number, since it uses more digits than its factorization.

72286237321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537722 (or 268861 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The spelling of 72286237321 in words is "seventy-two billion, two hundred eighty-six million, two hundred thirty-seven thousand, three hundred twenty-one".