81056252 has 12 divisors (see below), whose sum is σ = 142474920. Its totient is φ = 40349136.

The previous prime is 81056249. The next prime is 81056281. The reversal of 81056252 is 25265018.

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, 43727 + ... + 45542.

It is an arithmetic number, because the mean of its divisors is an integer number (11872910).

Almost surely, 2^81056252 is an apocalyptic number.

It is an amenable number.

81056252 is a deficient number, since it is larger than the sum of its proper divisors (61418668).

81056252 is a wasteful number, since it uses less digits than its factorization.

81056252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89500 (or 89498 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 81056252 is about 9003.1245687261. The cubic root of 81056252 is about 432.7750076965.

The spelling of 81056252 in words is "eighty-one million, fifty-six thousand, two hundred fifty-two".