213840030 has 32 divisors (see below), whose sum is σ = 514105344. Its totient is φ = 56925216.

The previous prime is 213840017. The next prime is 213840037. The reversal of 213840030 is 30048312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 213839979 and 213840006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213840037) 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 15 ways as a sum of consecutive naturals, for example, 12339 + ... + 24081.

It is an arithmetic number, because the mean of its divisors is an integer number (16065792).

Almost surely, 2^213840030 is an apocalyptic number.

213840030 is an abundant number, since it is smaller than the sum of its proper divisors (300265314).

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

213840030 is a wasteful number, since it uses less digits than its factorization.

213840030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12360.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 213840030 is about 14623.2701541071. The cubic root of 213840030 is about 597.9933240121.

Adding to 213840030 its reverse (30048312), we get a palindrome (243888342).

The spelling of 213840030 in words is "two hundred thirteen million, eight hundred forty thousand, thirty".