81153395 has 8 divisors (see below), whose sum is σ = 100016304. Its totient is φ = 63167904.

The previous prime is 81153383. The next prime is 81153419. The reversal of 81153395 is 59335118.

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 81153395 - 2¹⁰ = 81152371 is a prime.

It is a Duffinian number.

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, 219149 + ... + 219518.

It is an arithmetic number, because the mean of its divisors is an integer number (12502038).

Almost surely, 2^81153395 is an apocalyptic number.

81153395 is a deficient number, since it is larger than the sum of its proper divisors (18862909).

81153395 is a wasteful number, since it uses less digits than its factorization.

81153395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438709.

The product of its digits is 16200, while the sum is 35.

The square root of 81153395 is about 9008.5179136193. The cubic root of 81153395 is about 432.9478270979.

The spelling of 81153395 in words is "eighty-one million, one hundred fifty-three thousand, three hundred ninety-five".