71520533 has 8 divisors (see below), whose sum is σ = 81908160. Its totient is φ = 61175520.

The previous prime is 71520473. The next prime is 71520539. The reversal of 71520533 is 33502517.

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

It is not a de Polignac number, because 71520533 - 2⁶ = 71520469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71520539) 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, 6968 + ... + 13841.

It is an arithmetic number, because the mean of its divisors is an integer number (10238520).

Almost surely, 2^71520533 is an apocalyptic number.

It is an amenable number.

71520533 is a deficient number, since it is larger than the sum of its proper divisors (10387627).

71520533 is a wasteful number, since it uses less digits than its factorization.

71520533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21307.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 71520533 is about 8456.9813172313. The cubic root of 71520533 is about 415.0912520099.

The spelling of 71520533 in words is "seventy-one million, five hundred twenty thousand, five hundred thirty-three".