71255530 has 8 divisors (see below), whose sum is σ = 128259972. Its totient is φ = 28502208.

The previous prime is 71255497. The next prime is 71255557. The reversal of 71255530 is 3555217.

It can be written as a sum of positive squares in 2 ways, for example, as 71216721 + 38809 = 8439^2 + 197^2 .

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

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, 3562767 + ... + 3562786.

Almost surely, 2^71255530 is an apocalyptic number.

71255530 is a deficient number, since it is larger than the sum of its proper divisors (57004442).

71255530 is a wasteful number, since it uses less digits than its factorization.

71255530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7125560.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 71255530 is about 8441.2990706407. The cubic root of 71255530 is about 414.5779422265.

The spelling of 71255530 in words is "seventy-one million, two hundred fifty-five thousand, five hundred thirty".