72131085251 has 8 divisors (see below), whose sum is σ = 72531609600. Its totient is φ = 71730799560.

The previous prime is 72131085239. The next prime is 72131085259. The reversal of 72131085251 is 15258013127.

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-72131085251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72131085259) 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, 564530 + ... + 680408.

It is an arithmetic number, because the mean of its divisors is an integer number (9066451200).

Almost surely, 2^72131085251 is an apocalyptic number.

72131085251 is a deficient number, since it is larger than the sum of its proper divisors (400524349).

72131085251 is a wasteful number, since it uses less digits than its factorization.

72131085251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119329.

The product of its (nonzero) digits is 16800, while the sum is 35.

Adding to 72131085251 its reverse (15258013127), we get a palindrome (87389098378).

The spelling of 72131085251 in words is "seventy-two billion, one hundred thirty-one million, eighty-five thousand, two hundred fifty-one".