211742238 has 32 divisors (see below), whose sum is σ = 433557504. Its totient is φ = 68909472.

The previous prime is 211742233. The next prime is 211742239. The reversal of 211742238 is 832247112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211742233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170556 + ... + 171792.

It is an arithmetic number, because the mean of its divisors is an integer number (13548672).

Almost surely, 2^211742238 is an apocalyptic number.

211742238 is an abundant number, since it is smaller than the sum of its proper divisors (221815266).

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

211742238 is a wasteful number, since it uses less digits than its factorization.

211742238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896.

The product of its digits is 5376, while the sum is 30.

The square root of 211742238 is about 14551.3655029348. The cubic root of 211742238 is about 596.0314364903.

The spelling of 211742238 in words is "two hundred eleven million, seven hundred forty-two thousand, two hundred thirty-eight".