81023316 has 24 divisors (see below), whose sum is σ = 206241504. Its totient is φ = 24552480.

The previous prime is 81023291. The next prime is 81023317. The reversal of 81023316 is 61332018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81023317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306775 + ... + 307038.

It is an arithmetic number, because the mean of its divisors is an integer number (8593396).

Almost surely, 2^81023316 is an apocalyptic number.

It is an amenable number.

81023316 is an abundant number, since it is smaller than the sum of its proper divisors (125218188).

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

81023316 is a wasteful number, since it uses less digits than its factorization.

81023316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613831 (or 613829 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 81023316 is about 9001.2952401307. The cubic root of 81023316 is about 432.7163825304.

The spelling of 81023316 in words is "eighty-one million, twenty-three thousand, three hundred sixteen".