212103430 has 32 divisors (see below), whose sum is σ = 475994880. Its totient is φ = 66109920.

The previous prime is 212103413. The next prime is 212103431. The reversal of 212103430 is 34301212.

It is a happy number.

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 (212103431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136960 + ... + 138499.

It is an arithmetic number, because the mean of its divisors is an integer number (14874840).

Almost surely, 2^212103430 is an apocalyptic number.

212103430 is an abundant number, since it is smaller than the sum of its proper divisors (263891450).

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

212103430 is a wasteful number, since it uses less digits than its factorization.

212103430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275484.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 212103430 is about 14563.7711462382. The cubic root of 212103430 is about 596.3701494061.

Adding to 212103430 its reverse (34301212), we get a palindrome (246404642).

The spelling of 212103430 in words is "two hundred twelve million, one hundred three thousand, four hundred thirty".