71553071 has 2 divisors, whose sum is σ = 71553072. Its totient is φ = 71553070.

The previous prime is 71553047. The next prime is 71553073. The reversal of 71553071 is 17035517.

It is a strong prime.

It is an emirp because it is prime and its reverse (17035517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71553071 - 2⁶ = 71553007 is a prime.

It is a Sophie Germain prime.

Together with 71553073, 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 (71553073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35776535 + 35776536.

It is an arithmetic number, because the mean of its divisors is an integer number (35776536).

Almost surely, 2^71553071 is an apocalyptic number.

71553071 is a deficient number, since it is larger than the sum of its proper divisors (1).

71553071 is an equidigital number, since it uses as much as digits as its factorization.

71553071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3675, while the sum is 29.

The square root of 71553071 is about 8458.9048345516. The cubic root of 71553071 is about 415.1541905391.

Adding to 71553071 its reverse (17035517), we get a palindrome (88588588).

The spelling of 71553071 in words is "seventy-one million, five hundred fifty-three thousand, seventy-one".