81467272 has 16 divisors (see below), whose sum is σ = 153196560. Its totient is φ = 40614864.

The previous prime is 81467263. The next prime is 81467297. The reversal of 81467272 is 27276418.

It is an unprimeable number.

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, 11898 + ... + 17449.

It is an arithmetic number, because the mean of its divisors is an integer number (9574785).

Almost surely, 2^81467272 is an apocalyptic number.

It is an amenable number.

81467272 is a deficient number, since it is larger than the sum of its proper divisors (71729288).

81467272 is a wasteful number, since it uses less digits than its factorization.

81467272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29700 (or 29696 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 81467272 is about 9025.9222243492. The cubic root of 81467272 is about 433.5052798232.

It can be divided in two parts, 814 and 67272, that added together give a palindrome (68086).

The spelling of 81467272 in words is "eighty-one million, four hundred sixty-seven thousand, two hundred seventy-two".