80446821 has 32 divisors (see below), whose sum is σ = 132507648. Its totient is φ = 42275520.

The previous prime is 80446819. The next prime is 80446823. The reversal of 80446821 is 12864408.

It is an interprime number because it is at equal distance from previous prime (80446819) and next prime (80446823).

It is not a de Polignac number, because 80446821 - 2¹ = 80446819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80446823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127176 + ... + 127806.

It is an arithmetic number, because the mean of its divisors is an integer number (4140864).

Almost surely, 2^80446821 is an apocalyptic number.

It is an amenable number.

80446821 is a deficient number, since it is larger than the sum of its proper divisors (52060827).

80446821 is a wasteful number, since it uses less digits than its factorization.

80446821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 80446821 is about 8969.2151830581. The cubic root of 80446821 is about 431.6876546661.

The spelling of 80446821 in words is "eighty million, four hundred forty-six thousand, eight hundred twenty-one".