72485531 has 2 divisors, whose sum is σ = 72485532. Its totient is φ = 72485530.

The previous prime is 72485527. The next prime is 72485549. The reversal of 72485531 is 13558427.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13558427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72485531 - 2² = 72485527 is a prime.

It is a super-2 number, since 2×72485531² = 10508304408703922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 72485491 and 72485500.

It is not a weakly prime, because it can be changed into another prime (72485521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36242765 + 36242766.

It is an arithmetic number, because the mean of its divisors is an integer number (36242766).

Almost surely, 2^72485531 is an apocalyptic number.

72485531 is a deficient number, since it is larger than the sum of its proper divisors (1).

72485531 is an equidigital number, since it uses as much as digits as its factorization.

72485531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 35.

The square root of 72485531 is about 8513.8434916317. The cubic root of 72485531 is about 416.9498048528.

The spelling of 72485531 in words is "seventy-two million, four hundred eighty-five thousand, five hundred thirty-one".