81134170 has 32 divisors (see below), whose sum is σ = 162706320. Its totient is φ = 28922880.

The previous prime is 81134167. The next prime is 81134177. The reversal of 81134170 is 7143118.

It can be written as a sum of positive squares in 8 ways, for example, as 21427641 + 59706529 = 4629^2 + 7727^2 .

It is not an unprimeable number, because it can be changed into a prime (81134177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6991 + ... + 14530.

Almost surely, 2^81134170 is an apocalyptic number.

81134170 is an abundant number, since it is smaller than the sum of its proper divisors (81572150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81134170 is a wasteful number, since it uses less digits than its factorization.

81134170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21570.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 81134170 is about 9007.4508047505. The cubic root of 81134170 is about 432.9136363766.

Adding to 81134170 its reverse (7143118), we get a palindrome (88277288).

The spelling of 81134170 in words is "eighty-one million, one hundred thirty-four thousand, one hundred seventy".