81153107 has 8 divisors (see below), whose sum is σ = 95944800. Its totient is φ = 67161024.

The previous prime is 81153077. The next prime is 81153109. The reversal of 81153107 is 70135118.

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

It is not a de Polignac number, because 81153107 - 2⁶ = 81153043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81153109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199682 + ... + 200087.

It is an arithmetic number, because the mean of its divisors is an integer number (11993100).

Almost surely, 2^81153107 is an apocalyptic number.

81153107 is a deficient number, since it is larger than the sum of its proper divisors (14791693).

81153107 is a wasteful number, since it uses less digits than its factorization.

81153107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399805.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 81153107 is about 9008.5019287338. The cubic root of 81153107 is about 432.9473149438.

The spelling of 81153107 in words is "eighty-one million, one hundred fifty-three thousand, one hundred seven".