81543326 has 32 divisors (see below), whose sum is σ = 136166400. Its totient is φ = 36447840.

The previous prime is 81543317. The next prime is 81543367. The reversal of 81543326 is 62334518.

It is a junction number, because it is equal to n+sod(n) for n = 81543292 and 81543301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68456 + ... + 69636.

It is an arithmetic number, because the mean of its divisors is an integer number (4255200).

Almost surely, 2^81543326 is an apocalyptic number.

81543326 is a deficient number, since it is larger than the sum of its proper divisors (54623074).

81543326 is a wasteful number, since it uses less digits than its factorization.

81543326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304.

The product of its digits is 17280, while the sum is 32.

The square root of 81543326 is about 9030.1343290119. The cubic root of 81543326 is about 433.6401378890.

The spelling of 81543326 in words is "eighty-one million, five hundred forty-three thousand, three hundred twenty-six".