71083257 has 32 divisors (see below), whose sum is σ = 111648768. Its totient is φ = 39384576.

The previous prime is 71083241. The next prime is 71083261. The reversal of 71083257 is 75238017.

It is not a de Polignac number, because 71083257 - 2⁴ = 71083241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71083267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201193 + ... + 201545.

It is an arithmetic number, because the mean of its divisors is an integer number (3489024).

Almost surely, 2^71083257 is an apocalyptic number.

It is an amenable number.

71083257 is a deficient number, since it is larger than the sum of its proper divisors (40565511).

71083257 is a wasteful number, since it uses less digits than its factorization.

71083257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 71083257 is about 8431.0887197325. The cubic root of 71083257 is about 414.2435671466.

The spelling of 71083257 in words is "seventy-one million, eighty-three thousand, two hundred fifty-seven".