71507133 has 6 divisors (see below), whose sum is σ = 103288094. Its totient is φ = 47671416.

The previous prime is 71507129. The next prime is 71507141. The reversal of 71507133 is 33170517.

It can be written as a sum of positive squares in only one way, i.e., 71014329 + 492804 = 8427^2 + 702^2 .

It is not a de Polignac number, because 71507133 - 2² = 71507129 is a prime.

It is a super-2 number, since 2×71507133² = 10226540139759378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71507097 and 71507106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71507113) 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 5 ways as a sum of consecutive naturals, for example, 3972610 + ... + 3972627.

Almost surely, 2^71507133 is an apocalyptic number.

It is an amenable number.

71507133 is a deficient number, since it is larger than the sum of its proper divisors (31780961).

71507133 is a wasteful number, since it uses less digits than its factorization.

71507133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7945243 (or 7945240 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 27.

The square root of 71507133 is about 8456.1890352570. The cubic root of 71507133 is about 415.0653267268.

The spelling of 71507133 in words is "seventy-one million, five hundred seven thousand, one hundred thirty-three".