71057233 has 6 divisors (see below), whose sum is σ = 76943814. Its totient is φ = 65591136.

The previous prime is 71057219. The next prime is 71057249. The reversal of 71057233 is 33275017.

It can be written as a sum of positive squares in 3 ways, for example, as 10029889 + 61027344 = 3167^2 + 7812^2 .

It is not a de Polignac number, because 71057233 - 2⁵ = 71057201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71057293) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210060 + ... + 210397.

It is an arithmetic number, because the mean of its divisors is an integer number (12823969).

Almost surely, 2^71057233 is an apocalyptic number.

It is an amenable number.

71057233 is a deficient number, since it is larger than the sum of its proper divisors (5886581).

71057233 is a wasteful number, since it uses less digits than its factorization.

71057233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420483 (or 420470 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 71057233 is about 8429.5452427756. The cubic root of 71057233 is about 414.1930086377.

The spelling of 71057233 in words is "seventy-one million, fifty-seven thousand, two hundred thirty-three".