81477112 has 32 divisors (see below), whose sum is σ = 158338800. Its totient is φ = 39280384.

The previous prime is 81477103. The next prime is 81477133. The reversal of 81477112 is 21177418.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23388 + ... + 26644.

Almost surely, 2^81477112 is an apocalyptic number.

It is an amenable number.

81477112 is a deficient number, since it is larger than the sum of its proper divisors (76861688).

81477112 is a wasteful number, since it uses less digits than its factorization.

81477112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375 (or 3371 counting only the distinct ones).

The product of its digits is 3136, while the sum is 31.

The square root of 81477112 is about 9026.4673045439. The cubic root of 81477112 is about 433.5227327222.

The spelling of 81477112 in words is "eighty-one million, four hundred seventy-seven thousand, one hundred twelve".