211424430 has 32 divisors (see below), whose sum is σ = 579907584. Its totient is φ = 48325536.

The previous prime is 211424417. The next prime is 211424431. The reversal of 211424430 is 34424112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211424397 and 211424406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211424431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503182 + ... + 503601.

It is an arithmetic number, because the mean of its divisors is an integer number (18122112).

Almost surely, 2^211424430 is an apocalyptic number.

211424430 is an abundant number, since it is smaller than the sum of its proper divisors (368483154).

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

211424430 is a wasteful number, since it uses less digits than its factorization.

211424430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006800.

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

The square root of 211424430 is about 14540.4411900052. The cubic root of 211424430 is about 595.7330888240.

Adding to 211424430 its reverse (34424112), we get a palindrome (245848542).

The spelling of 211424430 in words is "two hundred eleven million, four hundred twenty-four thousand, four hundred thirty".