81101882 has 4 divisors (see below), whose sum is σ = 121652826. Its totient is φ = 40550940.

The previous prime is 81101869. The next prime is 81101897. The reversal of 81101882 is 28810118.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 77457601 + 3644281 = 8801^2 + 1909^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20275469 + ... + 20275472.

Almost surely, 2^81101882 is an apocalyptic number.

81101882 is a deficient number, since it is larger than the sum of its proper divisors (40550944).

81101882 is a wasteful number, since it uses less digits than its factorization.

81101882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40550943.

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 81101882 is about 9005.6583324041. The cubic root of 81101882 is about 432.8562015945.

The spelling of 81101882 in words is "eighty-one million, one hundred one thousand, eight hundred eighty-two".