81526195 has 8 divisors (see below), whose sum is σ = 99435600. Its totient is φ = 64151520.

The previous prime is 81526177. The next prime is 81526199. The reversal of 81526195 is 59162518.

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

It is not a de Polignac number, because 81526195 - 2¹⁷ = 81395123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81526199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133345 + ... + 133954.

It is an arithmetic number, because the mean of its divisors is an integer number (12429450).

Almost surely, 2^81526195 is an apocalyptic number.

81526195 is a deficient number, since it is larger than the sum of its proper divisors (17909405).

81526195 is a wasteful number, since it uses less digits than its factorization.

81526195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267365.

The product of its digits is 21600, while the sum is 37.

The square root of 81526195 is about 9029.1857329440. The cubic root of 81526195 is about 433.6097687186.

The spelling of 81526195 in words is "eighty-one million, five hundred twenty-six thousand, one hundred ninety-five".