212530351 has 4 divisors (see below), whose sum is σ = 231851304. Its totient is φ = 193209400.

The previous prime is 212530343. The next prime is 212530369. The reversal of 212530351 is 153035212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212530351 - 2³ = 212530343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212530301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9660460 + ... + 9660481.

It is an arithmetic number, because the mean of its divisors is an integer number (57962826).

Almost surely, 2^212530351 is an apocalyptic number.

212530351 is a deficient number, since it is larger than the sum of its proper divisors (19320953).

212530351 is a wasteful number, since it uses less digits than its factorization.

212530351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19320952.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 212530351 is about 14578.4207306553. The cubic root of 212530351 is about 596.7700051275.

Adding to 212530351 its reverse (153035212), we get a palindrome (365565563).

The spelling of 212530351 in words is "two hundred twelve million, five hundred thirty thousand, three hundred fifty-one".