72227591 has 2 divisors, whose sum is σ = 72227592. Its totient is φ = 72227590.

The previous prime is 72227581. The next prime is 72227593. The reversal of 72227591 is 19572227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72227591 - 2¹⁴ = 72211207 is a prime.

Together with 72227593, 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 (72227593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36113795 + 36113796.

It is an arithmetic number, because the mean of its divisors is an integer number (36113796).

Almost surely, 2^72227591 is an apocalyptic number.

72227591 is a deficient number, since it is larger than the sum of its proper divisors (1).

72227591 is an equidigital number, since it uses as much as digits as its factorization.

72227591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 35.

The square root of 72227591 is about 8498.6817213024. The cubic root of 72227591 is about 416.4546446280.

The spelling of 72227591 in words is "seventy-two million, two hundred twenty-seven thousand, five hundred ninety-one".