212401530 has 96 divisors (see below), whose sum is σ = 610908480. Its totient is φ = 50768640.

The previous prime is 212401529. The next prime is 212401543. The reversal of 212401530 is 35104212.

212401530 is a `hidden beast` number, since 212 + 401 + 53 + 0 = 666.

It is a super-2 number, since 2×212401530² = 90228819892681800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 70801 + ... + 73739.

It is an arithmetic number, because the mean of its divisors is an integer number (6363630).

Almost surely, 2^212401530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212401530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305454240).

212401530 is an abundant number, since it is smaller than the sum of its proper divisors (398506950).

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

212401530 is a wasteful number, since it uses less digits than its factorization.

212401530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036 (or 3033 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 212401530 is about 14574.0018526141. The cubic root of 212401530 is about 596.6494073775.

Adding to 212401530 its reverse (35104212), we get a palindrome (247505742).

The spelling of 212401530 in words is "two hundred twelve million, four hundred one thousand, five hundred thirty".