212393508 has 12 divisors (see below), whose sum is σ = 495584880. Its totient is φ = 70797832.

The previous prime is 212393507. The next prime is 212393509. The reversal of 212393508 is 805393212.

212393508 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212393507) and next prime (212393509).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×212393508² = 90222004481092128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212393501) 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, 8849718 + ... + 8849741.

It is an arithmetic number, because the mean of its divisors is an integer number (41298740).

Almost surely, 2^212393508 is an apocalyptic number.

It is an amenable number.

212393508 is an abundant number, since it is smaller than the sum of its proper divisors (283191372).

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

212393508 is a wasteful number, since it uses less digits than its factorization.

212393508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17699466 (or 17699464 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 212393508 is about 14573.7266339121. The cubic root of 212393508 is about 596.6418958468.

The spelling of 212393508 in words is "two hundred twelve million, three hundred ninety-three thousand, five hundred eight".