211242442240 has 40 divisors (see below), whose sum is σ = 506486768040. Its totient is φ = 84496975872.

The previous prime is 211242442231. The next prime is 211242442273. The reversal of 211242442240 is 42244242112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 211242442199 and 211242442208.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 41255730 + ... + 41260849.

It is an arithmetic number, because the mean of its divisors is an integer number (12662169201).

Almost surely, 2^211242442240 is an apocalyptic number.

211242442240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211242442240 is an abundant number, since it is smaller than the sum of its proper divisors (295244325800).

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

211242442240 is an frugal number, since it uses more digits than its factorization.

211242442240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82516602 (or 82516586 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 211242442240 its reverse (42244242112), we get a palindrome (253486684352).

The spelling of 211242442240 in words is "two hundred eleven billion, two hundred forty-two million, four hundred forty-two thousand, two hundred forty".