71521327 has 8 divisors (see below), whose sum is σ = 73089216. Its totient is φ = 69961632.

The previous prime is 71521313. The next prime is 71521369. The reversal of 71521327 is 72312517.

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-71521327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71521295 and 71521304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71521027) 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, 17613 + ... + 21289.

It is an arithmetic number, because the mean of its divisors is an integer number (9136152).

Almost surely, 2^71521327 is an apocalyptic number.

71521327 is a deficient number, since it is larger than the sum of its proper divisors (1567889).

71521327 is a wasteful number, since it uses less digits than its factorization.

71521327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097.

The product of its digits is 2940, while the sum is 28.

The square root of 71521327 is about 8457.0282605653. The cubic root of 71521327 is about 415.0927880780.

The spelling of 71521327 in words is "seventy-one million, five hundred twenty-one thousand, three hundred twenty-seven".