81053424 has 30 divisors (see below), whose sum is σ = 226837416. Its totient is φ = 27017760.

The previous prime is 81053407. The next prime is 81053459. The reversal of 81053424 is 42435018.

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 in 5 ways as a sum of consecutive naturals, for example, 281292 + ... + 281579.

Almost surely, 2^81053424 is an apocalyptic number.

It is an amenable number.

81053424 is an abundant number, since it is smaller than the sum of its proper divisors (145783992).

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

81053424 is a wasteful number, since it uses less digits than its factorization.

81053424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562885 (or 562876 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 81053424 is about 9002.9675107711. The cubic root of 81053424 is about 432.7699745583.

The spelling of 81053424 in words is "eighty-one million, fifty-three thousand, four hundred twenty-four".