71157133 has 2 divisors, whose sum is σ = 71157134. Its totient is φ = 71157132.

The previous prime is 71157113. The next prime is 71157137. The reversal of 71157133 is 33175117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36264484 + 34892649 = 6022^2 + 5907^2 .

It is a cyclic number.

It is not a de Polignac number, because 71157133 - 2²¹ = 69059981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71157137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35578566 + 35578567.

It is an arithmetic number, because the mean of its divisors is an integer number (35578567).

Almost surely, 2^71157133 is an apocalyptic number.

It is an amenable number.

71157133 is a deficient number, since it is larger than the sum of its proper divisors (1).

71157133 is an equidigital number, since it uses as much as digits as its factorization.

71157133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2205, while the sum is 28.

The square root of 71157133 is about 8435.4687480898. The cubic root of 71157133 is about 414.3870236299.

The spelling of 71157133 in words is "seventy-one million, one hundred fifty-seven thousand, one hundred thirty-three".