81255488 has 28 divisors (see below), whose sum is σ = 161963100. Its totient is φ = 40445952.

The previous prime is 81255469. The next prime is 81255491. The reversal of 81255488 is 88455218.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12166144 + 69089344 = 3488^2 + 8312^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12188 + ... + 17636.

Almost surely, 2^81255488 is an apocalyptic number.

It is an amenable number.

81255488 is a deficient number, since it is larger than the sum of its proper divisors (80707612).

81255488 is a wasteful number, since it uses less digits than its factorization.

81255488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694 (or 5684 counting only the distinct ones).

The product of its digits is 102400, while the sum is 41.

The square root of 81255488 is about 9014.1826029874. The cubic root of 81255488 is about 433.1293040821.

The spelling of 81255488 in words is "eighty-one million, two hundred fifty-five thousand, four hundred eighty-eight".