81751195 has 8 divisors (see below), whose sum is σ = 98207136. Its totient is φ = 65330496.

The previous prime is 81751193. The next prime is 81751231. The reversal of 81751195 is 59115718.

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 81751195 - 2¹ = 81751193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81751193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3402 + ... + 13231.

It is an arithmetic number, because the mean of its divisors is an integer number (12275892).

Almost surely, 2^81751195 is an apocalyptic number.

81751195 is a deficient number, since it is larger than the sum of its proper divisors (16455941).

81751195 is a wasteful number, since it uses less digits than its factorization.

81751195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17621.

The product of its digits is 12600, while the sum is 37.

The square root of 81751195 is about 9041.6367434221. The cubic root of 81751195 is about 434.0083014969.

The spelling of 81751195 in words is "eighty-one million, seven hundred fifty-one thousand, one hundred ninety-five".