80220845 has 4 divisors (see below), whose sum is σ = 96265020. Its totient is φ = 64176672.

The previous prime is 80220823. The next prime is 80220859. The reversal of 80220845 is 54802208.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9223369 + 70997476 = 3037^2 + 8426^2 .

It is a cyclic number.

It is not a de Polignac number, because 80220845 - 2⁶ = 80220781 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8022080 + ... + 8022089.

It is an arithmetic number, because the mean of its divisors is an integer number (24066255).

Almost surely, 2^80220845 is an apocalyptic number.

It is an amenable number.

80220845 is a deficient number, since it is larger than the sum of its proper divisors (16044175).

80220845 is a wasteful number, since it uses less digits than its factorization.

80220845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16044174.

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 80220845 is about 8956.6090123439. The cubic root of 80220845 is about 431.2830704878.

The spelling of 80220845 in words is "eighty million, two hundred twenty thousand, eight hundred forty-five".