212775560 has 32 divisors (see below), whose sum is σ = 480332160. Its totient is φ = 84828096.

The previous prime is 212775557. The next prime is 212775601. The reversal of 212775560 is 65577212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212775560.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3617 + ... + 20943.

It is an arithmetic number, because the mean of its divisors is an integer number (15010380).

Almost surely, 2^212775560 is an apocalyptic number.

212775560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212775560 is an abundant number, since it is smaller than the sum of its proper divisors (267556600).

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

212775560 is a wasteful number, since it uses less digits than its factorization.

212775560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17645 (or 17641 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 212775560 is about 14586.8283050155. The cubic root of 212775560 is about 596.9994266881. Note that the first 3 decimals are identical.

The spelling of 212775560 in words is "two hundred twelve million, seven hundred seventy-five thousand, five hundred sixty".