81106955 has 4 divisors (see below), whose sum is σ = 97328352. Its totient is φ = 64885560.

The previous prime is 81106937. The next prime is 81107011. The reversal of 81106955 is 55960118.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55960118 = 2 ⋅27980059.

It is not a de Polignac number, because 81106955 - 2⁸ = 81106699 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8110691 + ... + 8110700.

It is an arithmetic number, because the mean of its divisors is an integer number (24332088).

Almost surely, 2^81106955 is an apocalyptic number.

81106955 is a deficient number, since it is larger than the sum of its proper divisors (16221397).

81106955 is a wasteful number, since it uses less digits than its factorization.

81106955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16221396.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 81106955 is about 9005.9399842548. The cubic root of 81106955 is about 432.8652265957.

The spelling of 81106955 in words is "eighty-one million, one hundred six thousand, nine hundred fifty-five".