211434420 has 48 divisors (see below), whose sum is σ = 593304768. Its totient is φ = 56259840.

The previous prime is 211434407. The next prime is 211434439. The reversal of 211434420 is 24434112.

It is a congruent 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, 25872 + ... + 33048.

It is an arithmetic number, because the mean of its divisors is an integer number (12360516).

Almost surely, 2^211434420 is an apocalyptic number.

211434420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211434420 is an abundant number, since it is smaller than the sum of its proper divisors (381870348).

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

211434420 is a wasteful number, since it uses less digits than its factorization.

211434420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7680 (or 7678 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 211434420 is about 14540.7847105994. The cubic root of 211434420 is about 595.7424716561.

Adding to 211434420 its reverse (24434112), we get a palindrome (235868532).

The spelling of 211434420 in words is "two hundred eleven million, four hundred thirty-four thousand, four hundred twenty".