80212289 has 4 divisors (see below), whose sum is σ = 82978260. Its totient is φ = 77446320.

The previous prime is 80212261. The next prime is 80212291. The reversal of 80212289 is 98221208.

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 55011889 + 25200400 = 7417^2 + 5020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80212289 is a prime.

It is a super-2 number, since 2×80212289² = 12868022613239042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80211289) 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 3 ways as a sum of consecutive naturals, for example, 1382942 + ... + 1382999.

It is an arithmetic number, because the mean of its divisors is an integer number (20744565).

Almost surely, 2^80212289 is an apocalyptic number.

It is an amenable number.

80212289 is a deficient number, since it is larger than the sum of its proper divisors (2765971).

80212289 is a wasteful number, since it uses less digits than its factorization.

80212289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765970.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 80212289 is about 8956.1313634850. The cubic root of 80212289 is about 431.2677370287.

The spelling of 80212289 in words is "eighty million, two hundred twelve thousand, two hundred eighty-nine".