71483257 has 4 divisors (see below), whose sum is σ = 71593380. Its totient is φ = 71373136.

The previous prime is 71483239. The next prime is 71483261. The reversal of 71483257 is 75238417.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40246336 + 31236921 = 6344^2 + 5589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71483257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71483207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54082 + ... + 55387.

It is an arithmetic number, because the mean of its divisors is an integer number (17898345).

Almost surely, 2^71483257 is an apocalyptic number.

It is an amenable number.

71483257 is a deficient number, since it is larger than the sum of its proper divisors (110123).

71483257 is a wasteful number, since it uses less digits than its factorization.

71483257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110122.

The product of its digits is 47040, while the sum is 37.

The square root of 71483257 is about 8454.7771703339. Note that the first 3 decimals coincide. The cubic root of 71483257 is about 415.0191252617.

The spelling of 71483257 in words is "seventy-one million, four hundred eighty-three thousand, two hundred fifty-seven".