71755513 has 4 divisors (see below), whose sum is σ = 71860048. Its totient is φ = 71650980.

The previous prime is 71755507. The next prime is 71755529. The reversal of 71755513 is 31555717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71755513 - 2²¹ = 69658361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71755573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51231 + ... + 52612.

It is an arithmetic number, because the mean of its divisors is an integer number (17965012).

Almost surely, 2^71755513 is an apocalyptic number.

It is an amenable number.

71755513 is a deficient number, since it is larger than the sum of its proper divisors (104535).

71755513 is a wasteful number, since it uses less digits than its factorization.

71755513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104534.

The product of its digits is 18375, while the sum is 34.

The square root of 71755513 is about 8470.8625888985. The cubic root of 71755513 is about 415.5453477903.

The spelling of 71755513 in words is "seventy-one million, seven hundred fifty-five thousand, five hundred thirteen".