72227471 has 2 divisors, whose sum is σ = 72227472. Its totient is φ = 72227470.

The previous prime is 72227447. The next prime is 72227501. The reversal of 72227471 is 17472227.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (17472227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72227471 - 2¹⁰ = 72226447 is a prime.

It is a super-3 number, since 3×72227471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72227171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36113735 + 36113736.

It is an arithmetic number, because the mean of its divisors is an integer number (36113736).

Almost surely, 2^72227471 is an apocalyptic number.

72227471 is a deficient number, since it is larger than the sum of its proper divisors (1).

72227471 is an equidigital number, since it uses as much as digits as its factorization.

72227471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10976, while the sum is 32.

The square root of 72227471 is about 8498.6746613810. The cubic root of 72227471 is about 416.4544139933.

Adding to 72227471 its reverse (17472227), we get a palindrome (89699698).

The spelling of 72227471 in words is "seventy-two million, two hundred twenty-seven thousand, four hundred seventy-one".