81255752 has 12 divisors (see below), whose sum is σ = 152402355. Its totient is φ = 40615128.

The previous prime is 81255751. The next prime is 81255781. The reversal of 81255752 is 25755218.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 40627876 + 40627876 = 6374^2 + 6374^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6374.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81255751) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 23903 + ... + 27089.

Almost surely, 2^81255752 is an apocalyptic number.

It is an amenable number.

81255752 is a deficient number, since it is larger than the sum of its proper divisors (71146603).

81255752 is an frugal number, since it uses more digits than its factorization.

81255752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6380 (or 3189 counting only the distinct ones).

The product of its digits is 28000, while the sum is 35.

The square root of 81255752 is about 9014.1972465661. The cubic root of 81255752 is about 433.1297731623.

The spelling of 81255752 in words is "eighty-one million, two hundred fifty-five thousand, seven hundred fifty-two".