71221227 has 16 divisors (see below), whose sum is σ = 118394112. Its totient is φ = 36997920.

The previous prime is 71221217. The next prime is 71221259. The reversal of 71221227 is 72212217.

It is not a de Polignac number, because 71221227 - 2⁸ = 71220971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71221197 and 71221206.

It is not an unprimeable number, because it can be changed into a prime (71221207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153928 + ... + 154389.

It is an arithmetic number, because the mean of its divisors is an integer number (7399632).

Almost surely, 2^71221227 is an apocalyptic number.

71221227 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

71221227 is a deficient number, since it is larger than the sum of its proper divisors (47172885).

71221227 is a wasteful number, since it uses less digits than its factorization.

71221227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308338.

The product of its digits is 784, while the sum is 24.

The square root of 71221227 is about 8439.2669705372. The cubic root of 71221227 is about 414.5114044676.

The spelling of 71221227 in words is "seventy-one million, two hundred twenty-one thousand, two hundred twenty-seven".