81308114 has 8 divisors (see below), whose sum is σ = 123081420. Its totient is φ = 40280976.

The previous prime is 81308113. The next prime is 81308119. The reversal of 81308114 is 41180318.

It can be written as a sum of positive squares in 2 ways, for example, as 81090025 + 218089 = 9005^2 + 467^2 .

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

It is a super-2 number, since 2×81308114² = 13222018804473992, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81308111) 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, 186269 + ... + 186704.

Almost surely, 2^81308114 is an apocalyptic number.

81308114 is a deficient number, since it is larger than the sum of its proper divisors (41773306).

81308114 is a wasteful number, since it uses less digits than its factorization.

81308114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373084.

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

The square root of 81308114 is about 9017.1011971697. The cubic root of 81308114 is about 433.2227908696. Note that the first 3 decimals are identical.

The spelling of 81308114 in words is "eighty-one million, three hundred eight thousand, one hundred fourteen".