211242234 has 24 divisors (see below), whose sum is σ = 491462208. Its totient is φ = 60354840.

The previous prime is 211242233. The next prime is 211242271. The reversal of 211242234 is 432242112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 211242234.

It is not an unprimeable number, because it can be changed into a prime (211242233) 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, 358962 + ... + 359549.

It is an arithmetic number, because the mean of its divisors is an integer number (20477592).

Almost surely, 2^211242234 is an apocalyptic number.

211242234 is an abundant number, since it is smaller than the sum of its proper divisors (280219974).

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

211242234 is a wasteful number, since it uses less digits than its factorization.

211242234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718530 (or 718523 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 211242234 is about 14534.1746927715. The cubic root of 211242234 is about 595.5619143778.

Adding to 211242234 its reverse (432242112), we get a palindrome (643484346).

The spelling of 211242234 in words is "two hundred eleven million, two hundred forty-two thousand, two hundred thirty-four".