81750922 has 8 divisors (see below), whose sum is σ = 133774272. Its totient is φ = 37159500.

The previous prime is 81750899. The next prime is 81750941. The reversal of 81750922 is 22905718.

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, 1857954 + ... + 1857997.

It is an arithmetic number, because the mean of its divisors is an integer number (16721784).

Almost surely, 2^81750922 is an apocalyptic number.

81750922 is a deficient number, since it is larger than the sum of its proper divisors (52023350).

81750922 is a wasteful number, since it uses less digits than its factorization.

81750922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715964.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 81750922 is about 9041.6216465853. The cubic root of 81750922 is about 434.0078183872.

The spelling of 81750922 in words is "eighty-one million, seven hundred fifty thousand, nine hundred twenty-two".