71063213 has 8 divisors (see below), whose sum is σ = 81031608. Its totient is φ = 61737984.

The previous prime is 71063203. The next prime is 71063221. The reversal of 71063213 is 31236017.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31158724 + 39904489 = 5582^2 + 6317^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71063213 - 2⁶ = 71063149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71063203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160556 + ... + 160997.

It is an arithmetic number, because the mean of its divisors is an integer number (10128951).

Almost surely, 2^71063213 is an apocalyptic number.

It is an amenable number.

71063213 is a deficient number, since it is larger than the sum of its proper divisors (9968395).

71063213 is a wasteful number, since it uses less digits than its factorization.

71063213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321583.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 71063213 is about 8429.8999400942. The cubic root of 71063213 is about 414.2046274629.

The spelling of 71063213 in words is "seventy-one million, sixty-three thousand, two hundred thirteen".