212423130 has 48 divisors (see below), whose sum is σ = 555150024. Its totient is φ = 56353920.

The previous prime is 212423119. The next prime is 212423131. The reversal of 212423130 is 31324212.

212423130 is a `hidden beast` number, since 212 + 423 + 1 + 30 = 666.

212423130 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 207100881 + 5322249 = 14391^2 + 2307^2 .

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

It is not an unprimeable number, because it can be changed into a prime (212423131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11740 + ... + 23720.

Almost surely, 2^212423130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212423130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277575012).

212423130 is an abundant number, since it is smaller than the sum of its proper divisors (342726894).

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

212423130 is a wasteful number, since it uses less digits than its factorization.

212423130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12191 (or 12188 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 212423130 is about 14574.7428793787. The cubic root of 212423130 is about 596.6696319499.

Adding to 212423130 its reverse (31324212), we get a palindrome (243747342).

The spelling of 212423130 in words is "two hundred twelve million, four hundred twenty-three thousand, one hundred thirty".