72124525531 has 8 divisors (see below), whose sum is σ = 74866618944. Its totient is φ = 69432745920.

The previous prime is 72124525523. The next prime is 72124525637. The reversal of 72124525531 is 13552542127.

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 72124525531 - 2³ = 72124525523 is a prime.

It is a super-2 number, since 2×72124525531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72124525511) 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, 12575530 + ... + 12581263.

It is an arithmetic number, because the mean of its divisors is an integer number (9358327368).

Almost surely, 2^72124525531 is an apocalyptic number.

72124525531 is a deficient number, since it is larger than the sum of its proper divisors (2742093413).

72124525531 is a wasteful number, since it uses less digits than its factorization.

72124525531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25156901.

The product of its digits is 84000, while the sum is 37.

The spelling of 72124525531 in words is "seventy-two billion, one hundred twenty-four million, five hundred twenty-five thousand, five hundred thirty-one".