211242040 has 32 divisors (see below), whose sum is σ = 481995360. Its totient is φ = 83305600.

The previous prime is 211242037. The next prime is 211242049. The reversal of 211242040 is 40242112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211242049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34351 + ... + 40030.

It is an arithmetic number, because the mean of its divisors is an integer number (15062355).

Almost surely, 2^211242040 is an apocalyptic number.

211242040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211242040 is an abundant number, since it is smaller than the sum of its proper divisors (270753320).

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

211242040 is a wasteful number, since it uses less digits than its factorization.

211242040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74463 (or 74459 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 211242040 is about 14534.1680188444. The cubic root of 211242040 is about 595.5617320610.

Adding to 211242040 its reverse (40242112), we get a palindrome (251484152).

The spelling of 211242040 in words is "two hundred eleven million, two hundred forty-two thousand, forty".