71431625 has 8 divisors (see below), whose sum is σ = 89146824. Its totient is φ = 57145200.

The previous prime is 71431601. The next prime is 71431627. The reversal of 71431625 is 52613417.

It can be written as a sum of positive squares in 4 ways, for example, as 3748096 + 67683529 = 1936^2 + 8227^2 .

It is not a de Polignac number, because 71431625 - 2¹⁶ = 71366089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71431627) 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 7 ways as a sum of consecutive naturals, for example, 285602 + ... + 285851.

It is an arithmetic number, because the mean of its divisors is an integer number (11143353).

Almost surely, 2^71431625 is an apocalyptic number.

It is an amenable number.

71431625 is a deficient number, since it is larger than the sum of its proper divisors (17715199).

71431625 is an equidigital number, since it uses as much as digits as its factorization.

71431625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571468 (or 571458 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 71431625 is about 8451.7231970764. The cubic root of 71431625 is about 414.9191791129.

The spelling of 71431625 in words is "seventy-one million, four hundred thirty-one thousand, six hundred twenty-five".