211331242 has 8 divisors (see below), whose sum is σ = 318176100. Its totient is φ = 105272544.

The previous prime is 211331227. The next prime is 211331249. The reversal of 211331242 is 242133112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 150038001 + 61293241 = 12249^2 + 7829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (211331249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195867 + ... + 196942.

Almost surely, 2^211331242 is an apocalyptic number.

211331242 is a deficient number, since it is larger than the sum of its proper divisors (106844858).

211331242 is a wasteful number, since it uses less digits than its factorization.

211331242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393080.

The product of its digits is 288, while the sum is 19.

The square root of 211331242 is about 14537.2363948585. The cubic root of 211331242 is about 595.6455503224.

Adding to 211331242 its reverse (242133112), we get a palindrome (453464354).

The spelling of 211331242 in words is "two hundred eleven million, three hundred thirty-one thousand, two hundred forty-two".