71303161 has 4 divisors (see below), whose sum is σ = 71715492. Its totient is φ = 70890832.

The previous prime is 71303153. The next prime is 71303171. The reversal of 71303161 is 16130317.

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 64641600 + 6661561 = 8040^2 + 2581^2 .

It is a cyclic number.

It is not a de Polignac number, because 71303161 - 2³ = 71303153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71303101) 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, 205906 + ... + 206251.

It is an arithmetic number, because the mean of its divisors is an integer number (17928873).

Almost surely, 2^71303161 is an apocalyptic number.

It is an amenable number.

71303161 is a deficient number, since it is larger than the sum of its proper divisors (412331).

71303161 is a wasteful number, since it uses less digits than its factorization.

71303161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412330.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 71303161 is about 8444.1199067754. The cubic root of 71303161 is about 414.6702969938.

Adding to 71303161 its reverse (16130317), we get a palindrome (87433478).

It can be divided in two parts, 7130316 and 1, that added together give a palindrome (7130317).

The spelling of 71303161 in words is "seventy-one million, three hundred three thousand, one hundred sixty-one".