81622803 has 16 divisors (see below), whose sum is σ = 114878720. Its totient is φ = 51407136.

The previous prime is 81622799. The next prime is 81622811. The reversal of 81622803 is 30822618.

It is not a de Polignac number, because 81622803 - 2² = 81622799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81622873) 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, 20826 + ... + 24432.

It is an arithmetic number, because the mean of its divisors is an integer number (7179920).

Almost surely, 2^81622803 is an apocalyptic number.

81622803 is a deficient number, since it is larger than the sum of its proper divisors (33255917).

81622803 is a wasteful number, since it uses less digits than its factorization.

81622803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 81622803 is about 9034.5339116083. The cubic root of 81622803 is about 433.7809760093.

The spelling of 81622803 in words is "eighty-one million, six hundred twenty-two thousand, eight hundred three".