81548135 has 8 divisors (see below), whose sum is σ = 101014656. Its totient is φ = 63133920.

The previous prime is 81548113. The next prime is 81548177. The reversal of 81548135 is 53184518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81548135 - 2¹⁰ = 81547111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81548095 and 81548104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262904 + ... + 263213.

It is an arithmetic number, because the mean of its divisors is an integer number (12626832).

Almost surely, 2^81548135 is an apocalyptic number.

81548135 is a deficient number, since it is larger than the sum of its proper divisors (19466521).

81548135 is a wasteful number, since it uses less digits than its factorization.

81548135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526153.

The product of its digits is 19200, while the sum is 35.

The square root of 81548135 is about 9030.4006001949. The cubic root of 81548135 is about 433.6486623325.

The spelling of 81548135 in words is "eighty-one million, five hundred forty-eight thousand, one hundred thirty-five".