81275496 has 32 divisors (see below), whose sum is σ = 203860800. Its totient is φ = 27002240.

The previous prime is 81275449. The next prime is 81275497. The reversal of 81275496 is 69457218.

It is not an unprimeable number, because it can be changed into a prime (81275497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2020 + ... + 12908.

It is an arithmetic number, because the mean of its divisors is an integer number (6370650).

Almost surely, 2^81275496 is an apocalyptic number.

It is an amenable number.

81275496 is an abundant number, since it is smaller than the sum of its proper divisors (122585304).

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

81275496 is a wasteful number, since it uses less digits than its factorization.

81275496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11209 (or 11205 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 81275496 is about 9015.2923413498. The cubic root of 81275496 is about 433.1648517935.

The spelling of 81275496 in words is "eighty-one million, two hundred seventy-five thousand, four hundred ninety-six".