71351613 has 12 divisors (see below), whose sum is σ = 103185628. Its totient is φ = 47511360.

The previous prime is 71351597. The next prime is 71351617. The reversal of 71351613 is 31615317.

It can be written as a sum of positive squares in 2 ways, for example, as 29127609 + 42224004 = 5397^2 + 6498^2 .

It is not a de Polignac number, because 71351613 - 2⁴ = 71351597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71351617) 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 11 ways as a sum of consecutive naturals, for example, 4203 + ... + 12663.

Almost surely, 2^71351613 is an apocalyptic number.

It is an amenable number.

71351613 is a deficient number, since it is larger than the sum of its proper divisors (31834015).

71351613 is a wasteful number, since it uses less digits than its factorization.

71351613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9404 (or 9401 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 71351613 is about 8446.9883982399. The cubic root of 71351613 is about 414.7642014611.

It can be divided in two parts, 713 and 51613, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 71351613 in words is "seventy-one million, three hundred fifty-one thousand, six hundred thirteen".