81514112 has 16 divisors (see below), whose sum is σ = 162391650. Its totient is φ = 40756992.

The previous prime is 81514091. The next prime is 81514127. The reversal of 81514112 is 21141518.

It can be written as a sum of positive squares in only one way, i.e., 41267776 + 40246336 = 6424^2 + 6344^2 .

It is a tau number, because it is divible by the number of its divisors (16).

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 as a sum of consecutive naturals, namely, 318287 + ... + 318542.

Almost surely, 2^81514112 is an apocalyptic number.

It is an amenable number.

81514112 is a deficient number, since it is larger than the sum of its proper divisors (80877538).

81514112 is an equidigital number, since it uses as much as digits as its factorization.

81514112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636843 (or 636831 counting only the distinct ones).

The product of its digits is 320, while the sum is 23.

The square root of 81514112 is about 9028.5166001952. The cubic root of 81514112 is about 433.5883458876.

The spelling of 81514112 in words is "eighty-one million, five hundred fourteen thousand, one hundred twelve".