81232600 has 48 divisors (see below), whose sum is σ = 198815400. Its totient is φ = 30781440.

The previous prime is 81232549. The next prime is 81232601. The reversal of 81232600 is 623218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81232601) 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 11 ways as a sum of consecutive naturals, for example, 6889 + ... + 14488.

Almost surely, 2^81232600 is an apocalyptic number.

It is an amenable number.

81232600 is an abundant number, since it is smaller than the sum of its proper divisors (117582800).

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

81232600 is a wasteful number, since it uses less digits than its factorization.

81232600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21412 (or 21403 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 81232600 is about 9012.9129586388. The cubic root of 81232600 is about 433.0886323904.

Adding to 81232600 its reverse (623218), we get a palindrome (81855818).

The spelling of 81232600 in words is "eighty-one million, two hundred thirty-two thousand, six hundred".