71500525 has 6 divisors (see below), whose sum is σ = 88660682. Its totient is φ = 57200400.

The previous prime is 71500511. The next prime is 71500531. The reversal of 71500525 is 52500517.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7963684 + 63536841 = 2822^2 + 7971^2 .

It is not a de Polignac number, because 71500525 - 2⁵ = 71500493 is a prime.

It is a super-2 number, since 2×71500525² = 10224650150551250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 2860021 = 71500525 / (7 + 1 + 5 + 0 + 0 + 5 + 2 + 5).

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 71500525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1429986 + ... + 1430035.

Almost surely, 2^71500525 is an apocalyptic number.

It is an amenable number.

71500525 is a deficient number, since it is larger than the sum of its proper divisors (17160157).

71500525 is a wasteful number, since it uses less digits than its factorization.

71500525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860031 (or 2860026 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 71500525 is about 8455.7983064877. The cubic root of 71500525 is about 415.0525408874.

The spelling of 71500525 in words is "seventy-one million, five hundred thousand, five hundred twenty-five".