81032998 has 16 divisors (see below), whose sum is σ = 123140160. Its totient is φ = 39989376.

The previous prime is 81032981. The next prime is 81033023. The reversal of 81032998 is 89923018.

It is a self number, because there is not a number n which added to its sum of digits gives 81032998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72915 + ... + 74017.

It is an arithmetic number, because the mean of its divisors is an integer number (7696260).

Almost surely, 2^81032998 is an apocalyptic number.

81032998 is a deficient number, since it is larger than the sum of its proper divisors (42107162).

81032998 is a wasteful number, since it uses less digits than its factorization.

81032998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 81032998 is about 9001.8330355545. The cubic root of 81032998 is about 432.7336178702.

The spelling of 81032998 in words is "eighty-one million, thirty-two thousand, nine hundred ninety-eight".