81272588 has 12 divisors (see below), whose sum is σ = 145253472. Its totient is φ = 39771600.

The previous prime is 81272561. The next prime is 81272627. The reversal of 81272588 is 88527218.

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, 215963 + ... + 216338.

It is an arithmetic number, because the mean of its divisors is an integer number (12104456).

Almost surely, 2^81272588 is an apocalyptic number.

It is an amenable number.

81272588 is a deficient number, since it is larger than the sum of its proper divisors (63980884).

81272588 is a wasteful number, since it uses less digits than its factorization.

81272588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432352 (or 432350 counting only the distinct ones).

The product of its digits is 71680, while the sum is 41.

The square root of 81272588 is about 9015.1310583929. The cubic root of 81272588 is about 433.1596855853.

The spelling of 81272588 in words is "eighty-one million, two hundred seventy-two thousand, five hundred eighty-eight".