72275471 has 2 divisors, whose sum is σ = 72275472. Its totient is φ = 72275470.

The previous prime is 72275461. The next prime is 72275473. The reversal of 72275471 is 17457227.

It is a strong prime.

It is an emirp because it is prime and its reverse (17457227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72275471 is a prime.

It is a super-3 number, since 3×72275471³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 72275473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72275473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36137735 + 36137736.

It is an arithmetic number, because the mean of its divisors is an integer number (36137736).

Almost surely, 2^72275471 is an apocalyptic number.

72275471 is a deficient number, since it is larger than the sum of its proper divisors (1).

72275471 is an equidigital number, since it uses as much as digits as its factorization.

72275471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27440, while the sum is 35.

The square root of 72275471 is about 8501.4981620888. The cubic root of 72275471 is about 416.5466475301.

The spelling of 72275471 in words is "seventy-two million, two hundred seventy-five thousand, four hundred seventy-one".