71538305 has 4 divisors (see below), whose sum is σ = 85845972. Its totient is φ = 57230640.

The previous prime is 71538293. The next prime is 71538361. The reversal of 71538305 is 50383517.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29767936 + 41770369 = 5456^2 + 6463^2 .

It is not a de Polignac number, because 71538305 - 2¹⁰ = 71537281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7153826 + ... + 7153835.

It is an arithmetic number, because the mean of its divisors is an integer number (21461493).

Almost surely, 2^71538305 is an apocalyptic number.

It is an amenable number.

71538305 is a deficient number, since it is larger than the sum of its proper divisors (14307667).

71538305 is a wasteful number, since it uses less digits than its factorization.

71538305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14307666.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 71538305 is about 8458.0319814955. The cubic root of 71538305 is about 415.1256309054.

The spelling of 71538305 in words is "seventy-one million, five hundred thirty-eight thousand, three hundred five".