8181130 has 8 divisors (see below), whose sum is σ = 14726052. Its totient is φ = 3272448.

The previous prime is 8181127. The next prime is 8181139. The reversal of 8181130 is 311818.

It can be written as a sum of positive squares in 2 ways, for example, as 7623121 + 558009 = 2761^2 + 747^2 .

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

It is not an unprimeable number, because it can be changed into a prime (8181139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409047 + ... + 409066.

Almost surely, 2^8181130 is an apocalyptic number.

8181130 is a deficient number, since it is larger than the sum of its proper divisors (6544922).

8181130 is a wasteful number, since it uses less digits than its factorization.

8181130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818120.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 8181130 is about 2860.2674700105. The cubic root of 8181130 is about 201.4981661358.

Adding to 8181130 its reverse (311818), we get a palindrome (8492948).

The spelling of 8181130 in words is "eight million, one hundred eighty-one thousand, one hundred thirty".