81754312 has 32 divisors (see below), whose sum is σ = 158414400. Its totient is φ = 39524544.

The previous prime is 81754307. The next prime is 81754319. The reversal of 81754312 is 21345718.

It is not an unprimeable number, because it can be changed into a prime (81754319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52213 + ... + 53755.

It is an arithmetic number, because the mean of its divisors is an integer number (4950450).

Almost surely, 2^81754312 is an apocalyptic number.

It is an amenable number.

81754312 is a deficient number, since it is larger than the sum of its proper divisors (76660088).

81754312 is a wasteful number, since it uses less digits than its factorization.

81754312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765 (or 1761 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 81754312 is about 9041.8091110131. The cubic root of 81754312 is about 434.0138173661.

The spelling of 81754312 in words is "eighty-one million, seven hundred fifty-four thousand, three hundred twelve".