80212212 has 18 divisors (see below), whose sum is σ = 202758738. Its totient is φ = 26737392.

The previous prime is 80212207. The next prime is 80212241. The reversal of 80212212 is 21221208.

It is a happy number.

80212212 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 77369616 + 2842596 = 8796^2 + 1686^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

80212212 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1114023 + ... + 1114094.

Almost surely, 2^80212212 is an apocalyptic number.

It is an amenable number.

80212212 is an abundant number, since it is smaller than the sum of its proper divisors (122546526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80212212 is a wasteful number, since it uses less digits than its factorization.

80212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228127 (or 2228122 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 80212212 is about 8956.1270647529. The cubic root of 80212212 is about 431.2675990297.

The spelling of 80212212 in words is "eighty million, two hundred twelve thousand, two hundred twelve".