81202803 has 16 divisors (see below), whose sum is σ = 118286976. Its totient is φ = 49141440.

The previous prime is 81202747. The next prime is 81202841. The reversal of 81202803 is 30820218.

It is not a de Polignac number, because 81202803 - 2¹⁰ = 81201779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81202843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28575 + ... + 31287.

It is an arithmetic number, because the mean of its divisors is an integer number (7392936).

Almost surely, 2^81202803 is an apocalyptic number.

81202803 is a deficient number, since it is larger than the sum of its proper divisors (37084173).

81202803 is a wasteful number, since it uses less digits than its factorization.

81202803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 81202803 is about 9011.2597898407. The cubic root of 81202803 is about 433.0356720430.

The spelling of 81202803 in words is "eighty-one million, two hundred two thousand, eight hundred three".