81276332 has 6 divisors (see below), whose sum is σ = 142233588. Its totient is φ = 40638164.

The previous prime is 81276331. The next prime is 81276341. The reversal of 81276332 is 23367218.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81276331) 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 as a sum of consecutive naturals, namely, 10159538 + ... + 10159545.

It is an arithmetic number, because the mean of its divisors is an integer number (23705598).

Almost surely, 2^81276332 is an apocalyptic number.

It is an amenable number.

81276332 is a deficient number, since it is larger than the sum of its proper divisors (60957256).

81276332 is a wasteful number, since it uses less digits than its factorization.

81276332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20319087 (or 20319085 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 81276332 is about 9015.3387068928. The cubic root of 81276332 is about 433.1663369668.

The spelling of 81276332 in words is "eighty-one million, two hundred seventy-six thousand, three hundred thirty-two".