81210014 has 8 divisors (see below), whose sum is σ = 122932920. Its totient is φ = 40232376.

The previous prime is 81210007. The next prime is 81210067. The reversal of 81210014 is 41001218.

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

It is a junction number, because it is equal to n+sod(n) for n = 81209974 and 81210001.

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, 186044 + ... + 186479.

It is an arithmetic number, because the mean of its divisors is an integer number (15366615).

Almost surely, 2^81210014 is an apocalyptic number.

81210014 is a deficient number, since it is larger than the sum of its proper divisors (41722906).

81210014 is a wasteful number, since it uses less digits than its factorization.

81210014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372634.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 81210014 is about 9011.6598914961. The cubic root of 81210014 is about 433.0484898591.

The spelling of 81210014 in words is "eighty-one million, two hundred ten thousand, fourteen".