211266642 has 16 divisors (see below), whose sum is σ = 422713152. Its totient is φ = 70392240.

The previous prime is 211266637. The next prime is 211266647. The reversal of 211266642 is 246662112.

211266642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211266637) and next prime (211266647).

It is not an unprimeable number, because it can be changed into a prime (211266647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11467 + ... + 23537.

It is an arithmetic number, because the mean of its divisors is an integer number (26419572).

Almost surely, 2^211266642 is an apocalyptic number.

211266642 is an abundant number, since it is smaller than the sum of its proper divisors (211446510).

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

211266642 is a wasteful number, since it uses less digits than its factorization.

211266642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14993.

The product of its digits is 6912, while the sum is 30.

The square root of 211266642 is about 14535.0143446782. The cubic root of 211266642 is about 595.5848515766.

The spelling of 211266642 in words is "two hundred eleven million, two hundred sixty-six thousand, six hundred forty-two".