81083544 has 16 divisors (see below), whose sum is σ = 202708920. Its totient is φ = 27027840.

The previous prime is 81083521. The next prime is 81083573. The reversal of 81083544 is 44538018.

It is a super-2 number, since 2×81083544² = 13149082215199872, which contains 22 as substring.

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, 1689217 + ... + 1689264.

Almost surely, 2^81083544 is an apocalyptic number.

It is an amenable number.

81083544 is an abundant number, since it is smaller than the sum of its proper divisors (121625376).

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

81083544 is a wasteful number, since it uses less digits than its factorization.

81083544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378490 (or 3378486 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 81083544 is about 9004.6401371737. The cubic root of 81083544 is about 432.8235746683.

The spelling of 81083544 in words is "eighty-one million, eighty-three thousand, five hundred forty-four".