71540113 has 4 divisors (see below), whose sum is σ = 71661348. Its totient is φ = 71418880.

The previous prime is 71540099. The next prime is 71540123. The reversal of 71540113 is 31104517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31104517 = 991 ⋅31387.

It can be written as a sum of positive squares in 2 ways, for example, as 52591504 + 18948609 = 7252^2 + 4353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71540113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71540123) 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, 59728 + ... + 60913.

It is an arithmetic number, because the mean of its divisors is an integer number (17915337).

Almost surely, 2^71540113 is an apocalyptic number.

It is an amenable number.

71540113 is a deficient number, since it is larger than the sum of its proper divisors (121235).

71540113 is a wasteful number, since it uses less digits than its factorization.

71540113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121234.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 71540113 is about 8458.1388614754. The cubic root of 71540113 is about 415.1291280566.

The spelling of 71540113 in words is "seventy-one million, five hundred forty thousand, one hundred thirteen".