71313553 has 2 divisors, whose sum is σ = 71313554. Its totient is φ = 71313552.

The previous prime is 71313551. The next prime is 71313601. The reversal of 71313553 is 35531317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55249489 + 16064064 = 7433^2 + 4008^2 .

It is an emirp because it is prime and its reverse (35531317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71313553 - 2¹ = 71313551 is a prime.

Together with 71313551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71313551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35656776 + 35656777.

It is an arithmetic number, because the mean of its divisors is an integer number (35656777).

Almost surely, 2^71313553 is an apocalyptic number.

It is an amenable number.

71313553 is a deficient number, since it is larger than the sum of its proper divisors (1).

71313553 is an equidigital number, since it uses as much as digits as its factorization.

71313553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4725, while the sum is 28.

The square root of 71313553 is about 8444.7352237948. The cubic root of 71313553 is about 414.6904412358.

The spelling of 71313553 in words is "seventy-one million, three hundred thirteen thousand, five hundred fifty-three".