81741355 has 8 divisors (see below), whose sum is σ = 103859712. Its totient is φ = 61546368.

The previous prime is 81741353. The next prime is 81741383. The reversal of 81741355 is 55314718.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81741355 - 2¹ = 81741353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81741355.

It is not an unprimeable number, because it can be changed into a prime (81741353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480747 + ... + 480916.

It is an arithmetic number, because the mean of its divisors is an integer number (12982464).

Almost surely, 2^81741355 is an apocalyptic number.

81741355 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

81741355 is a deficient number, since it is larger than the sum of its proper divisors (22118357).

81741355 is a wasteful number, since it uses less digits than its factorization.

81741355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961685.

The product of its digits is 16800, while the sum is 34.

The square root of 81741355 is about 9041.0925777806. The cubic root of 81741355 is about 433.9908876310.

The spelling of 81741355 in words is "eighty-one million, seven hundred forty-one thousand, three hundred fifty-five".