72531 has 6 divisors (see below), whose sum is σ = 104780. Its totient is φ = 48348.
The previous prime is 72503. The next prime is 72533. The reversal of 72531 is 13527.
It is not a de Polignac number, because 72531 - 26 = 72467 is a prime.
It is a super-2 number, since 2×725312 = 10521491922, which contains 22 as substring.
It is a Duffinian number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 72531.
It is not an unprimeable number, because it can be changed into a prime (72533) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4021 + ... + 4038.
272531 is an apocalyptic number.
72531 is a deficient number, since it is larger than the sum of its proper divisors (32249).
72531 is a wasteful number, since it uses less digits than its factorization.
72531 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 8065 (or 8062 counting only the distinct ones).
The product of its digits is 210, while the sum is 18.
The square root of 72531 is about 269.3157997593. The cubic root of 72531 is about 41.7036968584.
The spelling of 72531 in words is "seventy-two thousand, five hundred thirty-one".
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