81098112 has 32 divisors (see below), whose sum is σ = 215417880. Its totient is φ = 27032576.

The previous prime is 81098107. The next prime is 81098113. The reversal of 81098112 is 21189018.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 81098112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81098113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105213 + ... + 105980.

Almost surely, 2^81098112 is an apocalyptic number.

It is an amenable number.

81098112 is an abundant number, since it is smaller than the sum of its proper divisors (134319768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81098112 is a wasteful number, since it uses less digits than its factorization.

81098112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211210 (or 211198 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 81098112 is about 9005.4490171229. The cubic root of 81098112 is about 432.8494944211.

The spelling of 81098112 in words is "eighty-one million, ninety-eight thousand, one hundred twelve".