81210343 has 8 divisors (see below), whose sum is σ = 86067360. Its totient is φ = 76362240.

The previous prime is 81210329. The next prime is 81210361. The reversal of 81210343 is 34301218.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81210343 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81210323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29823 + ... + 32431.

It is an arithmetic number, because the mean of its divisors is an integer number (10758420).

Almost surely, 2^81210343 is an apocalyptic number.

81210343 is a deficient number, since it is larger than the sum of its proper divisors (4857017).

81210343 is a wasteful number, since it uses less digits than its factorization.

81210343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 81210343 is about 9011.6781456064. The cubic root of 81210343 is about 433.0490746506.

The spelling of 81210343 in words is "eighty-one million, two hundred ten thousand, three hundred forty-three".