81528352 has 12 divisors (see below), whose sum is σ = 160509006. Its totient is φ = 40764160.

The previous prime is 81528341. The next prime is 81528389. The reversal of 81528352 is 25382518.

It can be written as a sum of positive squares in only one way, i.e., 80353296 + 1175056 = 8964^2 + 1084^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1273849 + ... + 1273912.

Almost surely, 2^81528352 is an apocalyptic number.

It is an amenable number.

81528352 is a deficient number, since it is larger than the sum of its proper divisors (78980654).

81528352 is a wasteful number, since it uses less digits than its factorization.

81528352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547771 (or 2547763 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 81528352 is about 9029.3051781408. The cubic root of 81528352 is about 433.6135927984.

The spelling of 81528352 in words is "eighty-one million, five hundred twenty-eight thousand, three hundred fifty-two".