212506320 has 80 divisors (see below), whose sum is σ = 709454592. Its totient is φ = 52308480.

The previous prime is 212506319. The next prime is 212506381. The reversal of 212506320 is 23605212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 30936 + ... + 37175.

Almost surely, 2^212506320 is an apocalyptic number.

212506320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212506320 is an abundant number, since it is smaller than the sum of its proper divisors (496948272).

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

212506320 is a wasteful number, since it uses less digits than its factorization.

212506320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68140 (or 68134 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 212506320 is about 14577.5965097131. The cubic root of 212506320 is about 596.7475118374.

The spelling of 212506320 in words is "two hundred twelve million, five hundred six thousand, three hundred twenty".