81130358 has 8 divisors (see below), whose sum is σ = 128854152. Its totient is φ = 38178976.

The previous prime is 81130339. The next prime is 81130363. The reversal of 81130358 is 85303118.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 81130358.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193060 + ... + 1193127.

It is an arithmetic number, because the mean of its divisors is an integer number (16106769).

Almost surely, 2^81130358 is an apocalyptic number.

81130358 is a deficient number, since it is larger than the sum of its proper divisors (47723794).

81130358 is a wasteful number, since it uses less digits than its factorization.

81130358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386206.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 81130358 is about 9007.2391996660. The cubic root of 81130358 is about 432.9068562796.

The spelling of 81130358 in words is "eighty-one million, one hundred thirty thousand, three hundred fifty-eight".