81358195 has 8 divisors (see below), whose sum is σ = 100996560. Its totient is φ = 62842080.

The previous prime is 81358187. The next prime is 81358213. The reversal of 81358195 is 59185318.

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

It is not a de Polignac number, because 81358195 - 2³ = 81358187 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280401 + ... + 280690.

It is an arithmetic number, because the mean of its divisors is an integer number (12624570).

Almost surely, 2^81358195 is an apocalyptic number.

81358195 is a deficient number, since it is larger than the sum of its proper divisors (19638365).

81358195 is a wasteful number, since it uses less digits than its factorization.

81358195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561125.

The product of its digits is 43200, while the sum is 40.

The square root of 81358195 is about 9019.8777707905. The cubic root of 81358195 is about 433.3117191718.

The spelling of 81358195 in words is "eighty-one million, three hundred fifty-eight thousand, one hundred ninety-five".