81071110 has 8 divisors (see below), whose sum is σ = 145928016. Its totient is φ = 32428440.

The previous prime is 81071077. The next prime is 81071129. The reversal of 81071110 is 1117018.

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

It is a congruent number.

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, 4053546 + ... + 4053565.

It is an arithmetic number, because the mean of its divisors is an integer number (18241002).

Almost surely, 2^81071110 is an apocalyptic number.

81071110 is a deficient number, since it is larger than the sum of its proper divisors (64856906).

81071110 is a wasteful number, since it uses less digits than its factorization.

81071110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8107118.

The product of its (nonzero) digits is 56, while the sum is 19.

The square root of 81071110 is about 9003.9496888865. The cubic root of 81071110 is about 432.8014493262.

Adding to 81071110 its reverse (1117018), we get a palindrome (82188128).

The spelling of 81071110 in words is "eighty-one million, seventy-one thousand, one hundred ten".