212142430 has 16 divisors (see below), whose sum is σ = 383089824. Its totient is φ = 84582880.

The previous prime is 212142377. The next prime is 212142457. The reversal of 212142430 is 34241212.

It is a junction number, because it is equal to n+sod(n) for n = 212142398 and 212142407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30997 + ... + 37216.

It is an arithmetic number, because the mean of its divisors is an integer number (23943114).

Almost surely, 2^212142430 is an apocalyptic number.

212142430 is a deficient number, since it is larger than the sum of its proper divisors (170947394).

212142430 is a wasteful number, since it uses less digits than its factorization.

212142430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68531.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 212142430 is about 14565.1100236147. The cubic root of 212142430 is about 596.4066992008.

Adding to 212142430 its reverse (34241212), we get a palindrome (246383642).

It can be divided in two parts, 2121 and 42430, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 212142430 in words is "two hundred twelve million, one hundred forty-two thousand, four hundred thirty".