212421530 has 8 divisors (see below), whose sum is σ = 382358772. Its totient is φ = 84968608.

The previous prime is 212421523. The next prime is 212421569. The reversal of 212421530 is 35124212.

212421530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 190246849 + 22174681 = 13793^2 + 4709^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10621067 + ... + 10621086.

Almost surely, 2^212421530 is an apocalyptic number.

212421530 is a deficient number, since it is larger than the sum of its proper divisors (169937242).

212421530 is a wasteful number, since it uses less digits than its factorization.

212421530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21242160.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212421530 is about 14574.6879897993. The cubic root of 212421530 is about 596.6681338804.

Adding to 212421530 its reverse (35124212), we get a palindrome (247545742).

The spelling of 212421530 in words is "two hundred twelve million, four hundred twenty-one thousand, five hundred thirty".