72131531593 has 8 divisors (see below), whose sum is σ = 78720411456. Its totient is φ = 65547896400.

The previous prime is 72131531533. The next prime is 72131531621. The reversal of 72131531593 is 39513513127.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72131531593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72131531533) 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, 1282378 + ... + 1337443.

It is an arithmetic number, because the mean of its divisors is an integer number (9840051432).

Almost surely, 2^72131531593 is an apocalyptic number.

It is an amenable number.

72131531593 is a deficient number, since it is larger than the sum of its proper divisors (6588879863).

72131531593 is a wasteful number, since it uses less digits than its factorization.

72131531593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622335.

The product of its digits is 85050, while the sum is 40.

The spelling of 72131531593 in words is "seventy-two billion, one hundred thirty-one million, five hundred thirty-one thousand, five hundred ninety-three".