81155327 has 24 divisors (see below), whose sum is σ = 94804992. Its totient is φ = 68878800.

The previous prime is 81155317. The next prime is 81155353. The reversal of 81155327 is 72355118.

It is not a de Polignac number, because 81155327 - 2¹⁰ = 81154303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81155293 and 81155302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81155317) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 424802 + ... + 424992.

It is an arithmetic number, because the mean of its divisors is an integer number (3950208).

Almost surely, 2^81155327 is an apocalyptic number.

81155327 is a deficient number, since it is larger than the sum of its proper divisors (13649665).

81155327 is a wasteful number, since it uses less digits than its factorization.

81155327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 328 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 81155327 is about 9008.6251448265. The cubic root of 81155327 is about 432.9512627667.

The spelling of 81155327 in words is "eighty-one million, one hundred fifty-five thousand, three hundred twenty-seven".