211421430 has 48 divisors (see below), whose sum is σ = 599670864. Its totient is φ = 51253440.

The previous prime is 211421387. The next prime is 211421437. The reversal of 211421430 is 34124112.

211421430 is a `hidden beast` number, since 211 + 4 + 21 + 430 = 666.

211421430 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211421437) 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 23 ways as a sum of consecutive naturals, for example, 105789 + ... + 107768.

It is an arithmetic number, because the mean of its divisors is an integer number (12493143).

Almost surely, 2^211421430 is an apocalyptic number.

211421430 is an abundant number, since it is smaller than the sum of its proper divisors (388249434).

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

211421430 is a wasteful number, since it uses less digits than its factorization.

211421430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213581 (or 213578 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 211421430 is about 14540.3380290831. The cubic root of 211421430 is about 595.7302710989.

Adding to 211421430 its reverse (34124112), we get a palindrome (245545542).

The spelling of 211421430 in words is "two hundred eleven million, four hundred twenty-one thousand, four hundred thirty".