72228271 has 2 divisors, whose sum is σ = 72228272. Its totient is φ = 72228270.

The previous prime is 72228263. The next prime is 72228293. The reversal of 72228271 is 17282227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72228271 - 2³ = 72228263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72223271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36114135 + 36114136.

It is an arithmetic number, because the mean of its divisors is an integer number (36114136).

Almost surely, 2^72228271 is an apocalyptic number.

72228271 is a deficient number, since it is larger than the sum of its proper divisors (1).

72228271 is an equidigital number, since it uses as much as digits as its factorization.

72228271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 31.

The square root of 72228271 is about 8498.7217274129. The cubic root of 72228271 is about 416.4559515537.

The spelling of 72228271 in words is "seventy-two million, two hundred twenty-eight thousand, two hundred seventy-one".