81303464 has 16 divisors (see below), whose sum is σ = 166302720. Its totient is φ = 36956080.

The previous prime is 81303461. The next prime is 81303479. The reversal of 81303464 is 46430318.

It is a super-2 number, since 2×81303464² = 13220506516798592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81303461) 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 3 ways as a sum of consecutive naturals, for example, 461864 + ... + 462039.

It is an arithmetic number, because the mean of its divisors is an integer number (10393920).

Almost surely, 2^81303464 is an apocalyptic number.

It is an amenable number.

81303464 is an abundant number, since it is smaller than the sum of its proper divisors (84999256).

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

81303464 is a wasteful number, since it uses less digits than its factorization.

81303464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923920 (or 923916 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 81303464 is about 9016.8433500865. The cubic root of 81303464 is about 433.2145320613.

The spelling of 81303464 in words is "eighty-one million, three hundred three thousand, four hundred sixty-four".