81339202 has 8 divisors (see below), whose sum is σ = 139438656. Its totient is φ = 34859652.

The previous prime is 81339199. The next prime is 81339217. The reversal of 81339202 is 20293318.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2904958 + ... + 2904985.

It is an arithmetic number, because the mean of its divisors is an integer number (17429832).

Almost surely, 2^81339202 is an apocalyptic number.

81339202 is a deficient number, since it is larger than the sum of its proper divisors (58099454).

81339202 is a wasteful number, since it uses less digits than its factorization.

81339202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5809952.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 81339202 is about 9018.8248680191. The cubic root of 81339202 is about 433.2779977993.

The spelling of 81339202 in words is "eighty-one million, three hundred thirty-nine thousand, two hundred two".