212805080 has 32 divisors (see below), whose sum is σ = 494259840. Its totient is φ = 82375680.

The previous prime is 212805077. The next prime is 212805083. The reversal of 212805080 is 80508212.

It is an interprime number because it is at equal distance from previous prime (212805077) and next prime (212805083).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212805083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84569 + ... + 87048.

It is an arithmetic number, because the mean of its divisors is an integer number (15445620).

Almost surely, 2^212805080 is an apocalyptic number.

212805080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212805080 is an abundant number, since it is smaller than the sum of its proper divisors (281454760).

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

212805080 is a wasteful number, since it uses less digits than its factorization.

212805080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171659 (or 171655 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 212805080 is about 14587.8401417071. The cubic root of 212805080 is about 597.0270341948.

The spelling of 212805080 in words is "two hundred twelve million, eight hundred five thousand, eighty".