211420344 has 32 divisors (see below), whose sum is σ = 528909840. Its totient is φ = 70425600.

The previous prime is 211420343. The next prime is 211420351. The reversal of 211420344 is 443024112.

It is a self number, because there is not a number n which added to its sum of digits gives 211420344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211420343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61224 + ... + 64584.

Almost surely, 2^211420344 is an apocalyptic number.

211420344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

211420344 is an abundant number, since it is smaller than the sum of its proper divisors (317489496).

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

211420344 is a wasteful number, since it uses less digits than its factorization.

211420344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5991 (or 5987 counting only the distinct ones).

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

The square root of 211420344 is about 14540.3006846489. The cubic root of 211420344 is about 595.7292510759.

Adding to 211420344 its reverse (443024112), we get a palindrome (654444456).

The spelling of 211420344 in words is "two hundred eleven million, four hundred twenty thousand, three hundred forty-four".