211444223240 has 64 divisors (see below), whose sum is σ = 480170496960. Its totient is φ = 83793864960.

The previous prime is 211444223233. The next prime is 211444223273. The reversal of 211444223240 is 42322444112.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 3179207 + ... + 3245033.

It is an arithmetic number, because the mean of its divisors is an integer number (7502664015).

Almost surely, 2^211444223240 is an apocalyptic number.

211444223240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211444223240 is an abundant number, since it is smaller than the sum of its proper divisors (268726273720).

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

211444223240 is a wasteful number, since it uses less digits than its factorization.

211444223240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66582 (or 66578 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 211444223240 its reverse (42322444112), we get a palindrome (253766667352).

The spelling of 211444223240 in words is "two hundred eleven billion, four hundred forty-four million, two hundred twenty-three thousand, two hundred forty".