81184052 has 6 divisors (see below), whose sum is σ = 142072098. Its totient is φ = 40592024.

The previous prime is 81184049. The next prime is 81184069. The reversal of 81184052 is 25048118.

It can be written as a sum of positive squares in only one way, i.e., 80928016 + 256036 = 8996^2 + 506^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10148003 + ... + 10148010.

It is an arithmetic number, because the mean of its divisors is an integer number (23678683).

Almost surely, 2^81184052 is an apocalyptic number.

It is an amenable number.

81184052 is a deficient number, since it is larger than the sum of its proper divisors (60888046).

81184052 is a wasteful number, since it uses less digits than its factorization.

81184052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20296017 (or 20296015 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 81184052 is about 9010.2193092066. The cubic root of 81184052 is about 433.0023379023.

The spelling of 81184052 in words is "eighty-one million, one hundred eighty-four thousand, fifty-two".