81850532 has 12 divisors (see below), whose sum is σ = 145587036. Its totient is φ = 40254240.

The previous prime is 81850519. The next prime is 81850579. The reversal of 81850532 is 23505818.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43112356 + 38738176 = 6566^2 + 6224^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167483 + ... + 167970.

It is an arithmetic number, because the mean of its divisors is an integer number (12132253).

Almost surely, 2^81850532 is an apocalyptic number.

It is an amenable number.

81850532 is a deficient number, since it is larger than the sum of its proper divisors (63736504).

81850532 is a wasteful number, since it uses less digits than its factorization.

81850532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335518 (or 335516 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 81850532 is about 9047.1283841891. The cubic root of 81850532 is about 434.1840201597.

The spelling of 81850532 in words is "eighty-one million, eight hundred fifty thousand, five hundred thirty-two".