211243434 has 32 divisors (see below), whose sum is σ = 444016320. Its totient is φ = 66915072.

The previous prime is 211243433. The next prime is 211243447. The reversal of 211243434 is 434342112.

211243434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211243434² = 89247576816224712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211243433) 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, 1519 + ... + 20610.

It is an arithmetic number, because the mean of its divisors is an integer number (13875510).

Almost surely, 2^211243434 is an apocalyptic number.

211243434 is an abundant number, since it is smaller than the sum of its proper divisors (232772886).

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

211243434 is a wasteful number, since it uses less digits than its factorization.

211243434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22214.

The product of its digits is 2304, while the sum is 24.

The square root of 211243434 is about 14534.2159747267. The cubic root of 211243434 is about 595.5630421083.

Adding to 211243434 its reverse (434342112), we get a palindrome (645585546).

The spelling of 211243434 in words is "two hundred eleven million, two hundred forty-three thousand, four hundred thirty-four".