81481095 has 24 divisors (see below), whose sum is σ = 141482016. Its totient is φ = 43380288.

The previous prime is 81481093. The next prime is 81481109. The reversal of 81481095 is 59018418.

It is not a de Polignac number, because 81481095 - 2¹ = 81481093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81481093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32217 + ... + 34653.

It is an arithmetic number, because the mean of its divisors is an integer number (5895084).

Almost surely, 2^81481095 is an apocalyptic number.

81481095 is a deficient number, since it is larger than the sum of its proper divisors (60000921).

81481095 is a wasteful number, since it uses less digits than its factorization.

81481095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191 (or 3188 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 81481095 is about 9026.6879307972. The cubic root of 81481095 is about 433.5297968447.

The spelling of 81481095 in words is "eighty-one million, four hundred eighty-one thousand, ninety-five".