72247543 has 2 divisors, whose sum is σ = 72247544. Its totient is φ = 72247542.

The previous prime is 72247499. The next prime is 72247559. The reversal of 72247543 is 34574227.

It is a strong prime.

It is an emirp because it is prime and its reverse (34574227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72247543 - 2²⁵ = 38693111 is a prime.

It is a super-3 number, since 3×72247543³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72247499 and 72247508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72247573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36123771 + 36123772.

It is an arithmetic number, because the mean of its divisors is an integer number (36123772).

Almost surely, 2^72247543 is an apocalyptic number.

72247543 is a deficient number, since it is larger than the sum of its proper divisors (1).

72247543 is an equidigital number, since it uses as much as digits as its factorization.

72247543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 34.

The square root of 72247543 is about 8499.8554693595. The cubic root of 72247543 is about 416.4929879535.

The spelling of 72247543 in words is "seventy-two million, two hundred forty-seven thousand, five hundred forty-three".