81053356 has 12 divisors (see below), whose sum is σ = 143169768. Its totient is φ = 40147712.

The previous prime is 81053341. The next prime is 81053363. The reversal of 81053356 is 65335018.

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, 94261 + ... + 95116.

It is an arithmetic number, because the mean of its divisors is an integer number (11930814).

Almost surely, 2^81053356 is an apocalyptic number.

It is an amenable number.

81053356 is a deficient number, since it is larger than the sum of its proper divisors (62116412).

81053356 is a wasteful number, since it uses less digits than its factorization.

81053356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189488 (or 189486 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 81053356 is about 9002.9637342377. The cubic root of 81053356 is about 432.7698535337.

The spelling of 81053356 in words is "eighty-one million, fifty-three thousand, three hundred fifty-six".