81054388 has 12 divisors (see below), whose sum is σ = 142152192. Its totient is φ = 40439480.

The previous prime is 81054373. The next prime is 81054401. The reversal of 81054388 is 88345018.

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 3 ways as a sum of consecutive naturals, for example, 19828 + ... + 23563.

It is an arithmetic number, because the mean of its divisors is an integer number (11846016).

Almost surely, 2^81054388 is an apocalyptic number.

It is an amenable number.

81054388 is a deficient number, since it is larger than the sum of its proper divisors (61097804).

81054388 is a wasteful number, since it uses less digits than its factorization.

81054388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43862 (or 43860 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 81054388 is about 9003.0210485148. The cubic root of 81054388 is about 432.7716902522.

The spelling of 81054388 in words is "eighty-one million, fifty-four thousand, three hundred eighty-eight".