212323430 has 32 divisors (see below), whose sum is σ = 418309920. Its totient is φ = 76952320.

The previous prime is 212323409. The next prime is 212323439. The reversal of 212323430 is 34323212.

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 (212323439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31826 + ... + 37914.

It is an arithmetic number, because the mean of its divisors is an integer number (13072185).

Almost surely, 2^212323430 is an apocalyptic number.

212323430 is a deficient number, since it is larger than the sum of its proper divisors (205986490).

212323430 is a wasteful number, since it uses less digits than its factorization.

212323430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 212323430 is about 14571.3221774827. The cubic root of 212323430 is about 596.5762691233.

Adding to 212323430 its reverse (34323212), we get a palindrome (246646642).

The spelling of 212323430 in words is "two hundred twelve million, three hundred twenty-three thousand, four hundred thirty".