81095041 has 4 divisors (see below), whose sum is σ = 81145300. Its totient is φ = 81044784.

The previous prime is 81095029. The next prime is 81095051. The reversal of 81095041 is 14059018.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48650625 + 32444416 = 6975^2 + 5696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81095041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81095011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22626 + ... + 25963.

It is an arithmetic number, because the mean of its divisors is an integer number (20286325).

Almost surely, 2^81095041 is an apocalyptic number.

It is an amenable number.

81095041 is a deficient number, since it is larger than the sum of its proper divisors (50259).

81095041 is a wasteful number, since it uses less digits than its factorization.

81095041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50258.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 81095041 is about 9005.2785076310. The cubic root of 81095041 is about 432.8440306787.

The spelling of 81095041 in words is "eighty-one million, ninety-five thousand, forty-one".