81184130 has 8 divisors (see below), whose sum is σ = 146131452. Its totient is φ = 32473648.

The previous prime is 81184123. The next prime is 81184151. The reversal of 81184130 is 3148118.

It can be written as a sum of positive squares in 2 ways, for example, as 81126049 + 58081 = 9007^2 + 241^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 81184130.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4059197 + ... + 4059216.

Almost surely, 2^81184130 is an apocalyptic number.

81184130 is a deficient number, since it is larger than the sum of its proper divisors (64947322).

81184130 is a wasteful number, since it uses less digits than its factorization.

81184130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8118420.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 81184130 is about 9010.2236376241. The cubic root of 81184130 is about 433.0024765756.

The spelling of 81184130 in words is "eighty-one million, one hundred eighty-four thousand, one hundred thirty".