81021314 has 8 divisors (see below), whose sum is σ = 132580368. Its totient is φ = 36827860.

The previous prime is 81021271. The next prime is 81021407. The reversal of 81021314 is 41312018.

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

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, 1841372 + ... + 1841415.

It is an arithmetic number, because the mean of its divisors is an integer number (16572546).

Almost surely, 2^81021314 is an apocalyptic number.

81021314 is a deficient number, since it is larger than the sum of its proper divisors (51559054).

81021314 is a wasteful number, since it uses less digits than its factorization.

81021314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682800.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 81021314 is about 9001.1840332259. The cubic root of 81021314 is about 432.7128185138.

The spelling of 81021314 in words is "eighty-one million, twenty-one thousand, three hundred fourteen".