81306110 has 8 divisors (see below), whose sum is σ = 146351016. Its totient is φ = 32522440.

The previous prime is 81306097. The next prime is 81306119. The reversal of 81306110 is 1160318.

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

It is a super-2 number, since 2×81306110² = 13221367046664200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81306119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4065296 + ... + 4065315.

It is an arithmetic number, because the mean of its divisors is an integer number (18293877).

Almost surely, 2^81306110 is an apocalyptic number.

81306110 is a deficient number, since it is larger than the sum of its proper divisors (65044906).

81306110 is a wasteful number, since it uses less digits than its factorization.

81306110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8130618.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 81306110 is about 9016.9900742986. The cubic root of 81306110 is about 433.2192316283.

Adding to 81306110 its reverse (1160318), we get a palindrome (82466428).

The spelling of 81306110 in words is "eighty-one million, three hundred six thousand, one hundred ten".