212243434 has 16 divisors (see below), whose sum is σ = 343234080. Its totient is φ = 97850160.

The previous prime is 212243413. The next prime is 212243459. The reversal of 212243434 is 434342212.

It is a happy number.

212243434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212243434² = 90094550552224712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212243399 and 212243408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22489 + ... + 30499.

It is an arithmetic number, because the mean of its divisors is an integer number (21452130).

Almost surely, 2^212243434 is an apocalyptic number.

212243434 is a deficient number, since it is larger than the sum of its proper divisors (130990646).

212243434 is a wasteful number, since it uses less digits than its factorization.

212243434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9045.

The product of its digits is 4608, while the sum is 25.

The square root of 212243434 is about 14568.5769380540. The cubic root of 212243434 is about 596.5013367273.

Adding to 212243434 its reverse (434342212), we get a palindrome (646585646).

The spelling of 212243434 in words is "two hundred twelve million, two hundred forty-three thousand, four hundred thirty-four".