71530133 has 2 divisors, whose sum is σ = 71530134. Its totient is φ = 71530132.

The previous prime is 71530127. The next prime is 71530177. The reversal of 71530133 is 33103517.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69522244 + 2007889 = 8338^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 71530133 - 2¹⁴ = 71513749 is a prime.

It is equal to p_4202780 and since 71530133 and 4202780 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 71530099 and 71530108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71530103) 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 as a sum of consecutive naturals, namely, 35765066 + 35765067.

It is an arithmetic number, because the mean of its divisors is an integer number (35765067).

Almost surely, 2^71530133 is an apocalyptic number.

It is an amenable number.

71530133 is a deficient number, since it is larger than the sum of its proper divisors (1).

71530133 is an equidigital number, since it uses as much as digits as its factorization.

71530133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 945, while the sum is 23.

The square root of 71530133 is about 8457.5488765954. The cubic root of 71530133 is about 415.1098233561.

The spelling of 71530133 in words is "seventy-one million, five hundred thirty thousand, one hundred thirty-three".