81285627 has 16 divisors (see below), whose sum is σ = 112186368. Its totient is φ = 52297440.

The previous prime is 81285599. The next prime is 81285641. The reversal of 81285627 is 72658218.

It is not a de Polignac number, because 81285627 - 2⁸ = 81285371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81285647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40213 + ... + 42185.

It is an arithmetic number, because the mean of its divisors is an integer number (7011648).

Almost surely, 2^81285627 is an apocalyptic number.

81285627 is a deficient number, since it is larger than the sum of its proper divisors (30900741).

81285627 is a wasteful number, since it uses less digits than its factorization.

81285627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450.

The product of its digits is 53760, while the sum is 39.

The square root of 81285627 is about 9015.8542024591. The cubic root of 81285627 is about 433.1828490621.

The spelling of 81285627 in words is "eighty-one million, two hundred eighty-five thousand, six hundred twenty-seven".