211426668 has 36 divisors (see below), whose sum is σ = 547478568. Its totient is φ = 68756160.

The previous prime is 211426651. The next prime is 211426669. The reversal of 211426668 is 866624112.

211426668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (211426669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70146 + ... + 73097.

It is an arithmetic number, because the mean of its divisors is an integer number (15207738).

Almost surely, 2^211426668 is an apocalyptic number.

It is an amenable number.

211426668 is an abundant number, since it is smaller than the sum of its proper divisors (336051900).

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

211426668 is a wasteful number, since it uses less digits than its factorization.

211426668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143294 (or 143289 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 211426668 is about 14540.5181475764. The cubic root of 211426668 is about 595.7351908295.

It can be divided in two parts, 2114 and 26668, that added together give a palindrome (28782).

The spelling of 211426668 in words is "two hundred eleven million, four hundred twenty-six thousand, six hundred sixty-eight".