81132955 has 8 divisors (see below), whose sum is σ = 97408800. Its totient is φ = 64873536.

The previous prime is 81132941. The next prime is 81132977. The reversal of 81132955 is 55923118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81132955 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81132955.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14151 + ... + 19039.

It is an arithmetic number, because the mean of its divisors is an integer number (12176100).

Almost surely, 2^81132955 is an apocalyptic number.

81132955 is a deficient number, since it is larger than the sum of its proper divisors (16275845).

81132955 is a wasteful number, since it uses less digits than its factorization.

81132955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8213.

The product of its digits is 10800, while the sum is 34.

The square root of 81132955 is about 9007.3833603328. The cubic root of 81132955 is about 432.9114753771.

The spelling of 81132955 in words is "eighty-one million, one hundred thirty-two thousand, nine hundred fifty-five".