71222647 has 2 divisors, whose sum is σ = 71222648. Its totient is φ = 71222646.

The previous prime is 71222633. The next prime is 71222653. The reversal of 71222647 is 74622217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71222647 - 2⁷ = 71222519 is a prime.

It is a Chen prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71222677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35611323 + 35611324.

It is an arithmetic number, because the mean of its divisors is an integer number (35611324).

Almost surely, 2^71222647 is an apocalyptic number.

71222647 is a deficient number, since it is larger than the sum of its proper divisors (1).

71222647 is an equidigital number, since it uses as much as digits as its factorization.

71222647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 31.

The square root of 71222647 is about 8439.3511006475. The cubic root of 71222647 is about 414.5141592749.

The spelling of 71222647 in words is "seventy-one million, two hundred twenty-two thousand, six hundred forty-seven".