81752852 has 12 divisors (see below), whose sum is σ = 146557236. Its totient is φ = 39879360.

The previous prime is 81752849. The next prime is 81752863. The reversal of 81752852 is 25825718.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27081616 + 54671236 = 5204^2 + 7394^2 .

It is a congruent number.

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, 249083 + ... + 249410.

It is an arithmetic number, because the mean of its divisors is an integer number (12213103).

Almost surely, 2^81752852 is an apocalyptic number.

81752852 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

81752852 is a deficient number, since it is larger than the sum of its proper divisors (64804384).

81752852 is a wasteful number, since it uses less digits than its factorization.

81752852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498538 (or 498536 counting only the distinct ones).

The product of its digits is 44800, while the sum is 38.

The square root of 81752852 is about 9041.7283745974. The cubic root of 81752852 is about 434.0112337554.

The spelling of 81752852 in words is "eighty-one million, seven hundred fifty-two thousand, eight hundred fifty-two".