81252852 has 12 divisors (see below), whose sum is σ = 189590016. Its totient is φ = 27084280.

The previous prime is 81252841. The next prime is 81252893. The reversal of 81252852 is 25825218.

It is a tau number, because it is divible by the number of its divisors (12).

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, 3385524 + ... + 3385547.

It is an arithmetic number, because the mean of its divisors is an integer number (15799168).

Almost surely, 2^81252852 is an apocalyptic number.

It is an amenable number.

81252852 is an abundant number, since it is smaller than the sum of its proper divisors (108337164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81252852 is a wasteful number, since it uses less digits than its factorization.

81252852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771078 (or 6771076 counting only the distinct ones).

The product of its digits is 12800, while the sum is 33.

The square root of 81252852 is about 9014.0363877677. The cubic root of 81252852 is about 433.1246203320.

The spelling of 81252852 in words is "eighty-one million, two hundred fifty-two thousand, eight hundred fifty-two".