81336214 has 8 divisors (see below), whose sum is σ = 122421600. Its totient is φ = 40529016.

The previous prime is 81336193. The next prime is 81336223. The reversal of 81336214 is 41263318.

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, 68814 + ... + 69985.

It is an arithmetic number, because the mean of its divisors is an integer number (15302700).

Almost surely, 2^81336214 is an apocalyptic number.

81336214 is a deficient number, since it is larger than the sum of its proper divisors (41085386).

81336214 is a wasteful number, since it uses less digits than its factorization.

81336214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139094.

The product of its digits is 3456, while the sum is 28.

The square root of 81336214 is about 9018.6592129873. The cubic root of 81336214 is about 433.2726922374.

The spelling of 81336214 in words is "eighty-one million, three hundred thirty-six thousand, two hundred fourteen".