71205223 has 2 divisors, whose sum is σ = 71205224. Its totient is φ = 71205222.

The previous prime is 71205221. The next prime is 71205241. The reversal of 71205223 is 32250217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71205223 - 2¹ = 71205221 is a prime.

Together with 71205221, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 71205194 and 71205203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71205221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35602611 + 35602612.

It is an arithmetic number, because the mean of its divisors is an integer number (35602612).

Almost surely, 2^71205223 is an apocalyptic number.

71205223 is a deficient number, since it is larger than the sum of its proper divisors (1).

71205223 is an equidigital number, since it uses as much as digits as its factorization.

71205223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 71205223 is about 8438.3187306477. The cubic root of 71205223 is about 414.4803540923.

The spelling of 71205223 in words is "seventy-one million, two hundred five thousand, two hundred twenty-three".