81003201 has 8 divisors (see below), whose sum is σ = 109616544. Its totient is φ = 53196000.

The previous prime is 81003187. The next prime is 81003229. The reversal of 81003201 is 10230018.

It is a happy number.

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

It is not a de Polignac number, because 81003201 - 2¹¹ = 81001153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81003281) 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, 201300 + ... + 201701.

It is an arithmetic number, because the mean of its divisors is an integer number (13702068).

Almost surely, 2^81003201 is an apocalyptic number.

It is an amenable number.

81003201 is a deficient number, since it is larger than the sum of its proper divisors (28613343).

81003201 is a wasteful number, since it uses less digits than its factorization.

81003201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403071.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 81003201 is about 9000.1778315764. The cubic root of 81003201 is about 432.6805705738.

Adding to 81003201 its reverse (10230018), we get a palindrome (91233219).

The spelling of 81003201 in words is "eighty-one million, three thousand, two hundred one".