211423014 has 64 divisors (see below), whose sum is σ = 523514880. Its totient is φ = 62696160.

The previous prime is 211422979. The next prime is 211423063. The reversal of 211423014 is 410324112.

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

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 24132 + ... + 31704.

It is an arithmetic number, because the mean of its divisors is an integer number (8179920).

Almost surely, 2^211423014 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211423014, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261757440).

211423014 is an abundant number, since it is smaller than the sum of its proper divisors (312091866).

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

211423014 is a wasteful number, since it uses less digits than its factorization.

211423014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7642 (or 7636 counting only the distinct ones).

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

The square root of 211423014 is about 14540.3924981412. The cubic root of 211423014 is about 595.7317588611.

Adding to 211423014 its reverse (410324112), we get a palindrome (621747126).

The spelling of 211423014 in words is "two hundred eleven million, four hundred twenty-three thousand, fourteen".