72226571 has 2 divisors, whose sum is σ = 72226572. Its totient is φ = 72226570.

The previous prime is 72226547. The next prime is 72226573. The reversal of 72226571 is 17562227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72226571 - 2⁶ = 72226507 is a prime.

Together with 72226573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72226573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36113285 + 36113286.

It is an arithmetic number, because the mean of its divisors is an integer number (36113286).

Almost surely, 2^72226571 is an apocalyptic number.

72226571 is a deficient number, since it is larger than the sum of its proper divisors (1).

72226571 is an equidigital number, since it uses as much as digits as its factorization.

72226571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 32.

The square root of 72226571 is about 8498.6217117836. The cubic root of 72226571 is about 416.4526842242.

Adding to 72226571 its reverse (17562227), we get a palindrome (89788798).

The spelling of 72226571 in words is "seventy-two million, two hundred twenty-six thousand, five hundred seventy-one".