211233430434 has 32 divisors (see below), whose sum is σ = 455622842304. Its totient is φ = 64900825920.

The previous prime is 211233430427. The next prime is 211233430477. The reversal of 211233430434 is 434034332112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1905669 + ... + 2013464.

It is an arithmetic number, because the mean of its divisors is an integer number (14238213822).

Almost surely, 2^211233430434 is an apocalyptic number.

211233430434 is an abundant number, since it is smaller than the sum of its proper divisors (244389411870).

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

211233430434 is a wasteful number, since it uses less digits than its factorization.

211233430434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3919842.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 211233430434 its reverse (434034332112), we get a palindrome (645267762546).

The spelling of 211233430434 in words is "two hundred eleven billion, two hundred thirty-three million, four hundred thirty thousand, four hundred thirty-four".