71130133 has 4 divisors (see below), whose sum is σ = 71151340. Its totient is φ = 71108928.

The previous prime is 71130113. The next prime is 71130149. The reversal of 71130133 is 33103117.

It is a happy number.

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 61748164 + 9381969 = 7858^2 + 3063^2 .

It is a cyclic number.

It is not a de Polignac number, because 71130133 - 2⁹ = 71129621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71130133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71130113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4338 + ... + 12691.

It is an arithmetic number, because the mean of its divisors is an integer number (17787835).

Almost surely, 2^71130133 is an apocalyptic number.

It is an amenable number.

71130133 is a deficient number, since it is larger than the sum of its proper divisors (21207).

71130133 is a wasteful number, since it uses less digits than its factorization.

71130133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21206.

The product of its (nonzero) digits is 189, while the sum is 19.

The square root of 71130133 is about 8433.8682109694. The cubic root of 71130133 is about 414.3346050618.

The spelling of 71130133 in words is "seventy-one million, one hundred thirty thousand, one hundred thirty-three".