81063501 has 8 divisors (see below), whose sum is σ = 109698144. Its totient is φ = 53235600.

The previous prime is 81063487. The next prime is 81063503. The reversal of 81063501 is 10536018.

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

It is not a de Polignac number, because 81063501 - 2⁷ = 81063373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81063503) 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, 201450 + ... + 201851.

It is an arithmetic number, because the mean of its divisors is an integer number (13712268).

Almost surely, 2^81063501 is an apocalyptic number.

It is an amenable number.

81063501 is a deficient number, since it is larger than the sum of its proper divisors (28634643).

81063501 is a wasteful number, since it uses less digits than its factorization.

81063501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403371.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 81063501 is about 9003.5271421816. The cubic root of 81063501 is about 432.7879085829.

Adding to 81063501 its reverse (10536018), we get a palindrome (91599519).

It can be divided in two parts, 8106350 and 1, that added together give a triangular number (8106351 = T₄₀₂₆).

The spelling of 81063501 in words is "eighty-one million, sixty-three thousand, five hundred one".