230521212 has 72 divisors (see below), whose sum is σ = 594397440. Its totient is φ = 75315360.

The previous prime is 230521199. The next prime is 230521217. The reversal of 230521212 is 212125032.

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

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230521217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 534637 + ... + 535067.

It is an arithmetic number, because the mean of its divisors is an integer number (8255520).

Almost surely, 2^230521212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 230521212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297198720).

230521212 is an abundant number, since it is smaller than the sum of its proper divisors (363876228).

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

230521212 is a wasteful number, since it uses less digits than its factorization.

230521212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 698 counting only the distinct ones).

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

The square root of 230521212 is about 15182.9250146340. The cubic root of 230521212 is about 613.1550338949.

Adding to 230521212 its reverse (212125032), we get a palindrome (442646244).

The spelling of 230521212 in words is "two hundred thirty million, five hundred twenty-one thousand, two hundred twelve".