81331114 has 8 divisors (see below), whose sum is σ = 122159268. Its totient is φ = 40611360.

The previous prime is 81331093. The next prime is 81331121. The reversal of 81331114 is 41113318.

It can be written as a sum of positive squares in 2 ways, for example, as 74218225 + 7112889 = 8615^2 + 2667^2 .

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

It is a super-2 number, since 2×81331114² = 13229500208961992, which contains 22 as substring.

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, 25197 + ... + 28240.

Almost surely, 2^81331114 is an apocalyptic number.

81331114 is a deficient number, since it is larger than the sum of its proper divisors (40828154).

81331114 is a wasteful number, since it uses less digits than its factorization.

81331114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54200.

The product of its digits is 288, while the sum is 22.

The square root of 81331114 is about 9018.3764614259. The cubic root of 81331114 is about 433.2636362593.

The spelling of 81331114 in words is "eighty-one million, three hundred thirty-one thousand, one hundred fourteen".