81053159 has 8 divisors (see below), whose sum is σ = 88488720. Its totient is φ = 73628800.

The previous prime is 81053153. The next prime is 81053179. The reversal of 81053159 is 95135018.

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 81053159 - 2⁴ = 81053143 is a prime.

It is a super-2 number, since 2×81053159² = 13139229167758562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81053153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21689 + ... + 25149.

It is an arithmetic number, because the mean of its divisors is an integer number (11061090).

Almost surely, 2^81053159 is an apocalyptic number.

81053159 is a deficient number, since it is larger than the sum of its proper divisors (7435561).

81053159 is a wasteful number, since it uses less digits than its factorization.

81053159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5601.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 81053159 is about 9002.9527933895. The cubic root of 81053159 is about 432.7695029180.

The spelling of 81053159 in words is "eighty-one million, fifty-three thousand, one hundred fifty-nine".