71031825 has 18 divisors (see below), whose sum is σ = 127226294. Its totient is φ = 37883520.

The previous prime is 71031799. The next prime is 71031827. The reversal of 71031825 is 52813017.

It can be written as a sum of positive squares in 3 ways, for example, as 16257024 + 54774801 = 4032^2 + 7401^2 .

It is not a de Polignac number, because 71031825 - 2¹³ = 71023633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71031827) 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 17 ways as a sum of consecutive naturals, for example, 157624 + ... + 158073.

Almost surely, 2^71031825 is an apocalyptic number.

71031825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71031825 is a deficient number, since it is larger than the sum of its proper divisors (56194469).

71031825 is a wasteful number, since it uses less digits than its factorization.

71031825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315713 (or 315705 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 71031825 is about 8428.0380279161. The cubic root of 71031825 is about 414.1436349610.

The spelling of 71031825 in words is "seventy-one million, thirty-one thousand, eight hundred twenty-five".