71512825 has 12 divisors (see below), whose sum is σ = 88900560. Its totient is φ = 57065360.

The previous prime is 71512817. The next prime is 71512853. The reversal of 71512825 is 52821517.

It is not a de Polignac number, because 71512825 - 2³ = 71512817 is a prime.

It is a super-2 number, since 2×71512825² = 10228168278961250, which contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7062 + ... + 13888.

It is an arithmetic number, because the mean of its divisors is an integer number (7408380).

Almost surely, 2^71512825 is an apocalyptic number.

It is an amenable number.

71512825 is a deficient number, since it is larger than the sum of its proper divisors (17387735).

71512825 is a wasteful number, since it uses less digits than its factorization.

71512825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7256 (or 7251 counting only the distinct ones).

The product of its digits is 5600, while the sum is 31.

The square root of 71512825 is about 8456.5255867880. The cubic root of 71512825 is about 415.0763395636.

The spelling of 71512825 in words is "seventy-one million, five hundred twelve thousand, eight hundred twenty-five".