81303024 has 80 divisors (see below), whose sum is σ = 234520704. Its totient is φ = 24057600.

The previous prime is 81302971. The next prime is 81303029. The reversal of 81303024 is 42030318.

It is a happy number.

It is a super-2 number, since 2×81303024² = 13220363423089152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81303029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20914 + ... + 24494.

Almost surely, 2^81303024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81303024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117260352).

81303024 is an abundant number, since it is smaller than the sum of its proper divisors (153217680).

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

81303024 is a wasteful number, since it uses less digits than its factorization.

81303024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 81303024 is about 9016.8189512710. The cubic root of 81303024 is about 433.2137505664.

The spelling of 81303024 in words is "eighty-one million, three hundred three thousand, twenty-four".