81162548 has 12 divisors (see below), whose sum is σ = 142749600. Its totient is φ = 40376952.

The previous prime is 81162541. The next prime is 81162553. The reversal of 81162548 is 84526118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81162541) 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, 50186 + ... + 51777.

It is an arithmetic number, because the mean of its divisors is an integer number (11895800).

Almost surely, 2^81162548 is an apocalyptic number.

It is an amenable number.

81162548 is a deficient number, since it is larger than the sum of its proper divisors (61587052).

81162548 is a wasteful number, since it uses less digits than its factorization.

81162548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102166 (or 102164 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 81162548 is about 9009.0259184886. The cubic root of 81162548 is about 432.9641033629.

The spelling of 81162548 in words is "eighty-one million, one hundred sixty-two thousand, five hundred forty-eight".