71508013 has 8 divisors (see below), whose sum is σ = 73932800. Its totient is φ = 69109200.

The previous prime is 71508007. The next prime is 71508023. The reversal of 71508013 is 31080517.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71508013 is a prime.

It is a super-2 number, since 2×71508013² = 10226791846416338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71508023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813 + ... + 11986.

It is an arithmetic number, because the mean of its divisors is an integer number (9241600).

Almost surely, 2^71508013 is an apocalyptic number.

It is an amenable number.

71508013 is a deficient number, since it is larger than the sum of its proper divisors (2424787).

71508013 is a wasteful number, since it uses less digits than its factorization.

71508013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12987.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 71508013 is about 8456.2410679923. The cubic root of 71508013 is about 415.0670293821.

The spelling of 71508013 in words is "seventy-one million, five hundred eight thousand, thirteen".