211420243264 has 28 divisors (see below), whose sum is σ = 434003843700. Its totient is φ = 102064944128.

The previous prime is 211420243253. The next prime is 211420243337. The reversal of 211420243264 is 462342024112.

It can be written as a sum of positive squares in 2 ways, for example, as 109301649664 + 102118593600 = 330608^2 + 319560^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56954029 + ... + 56957740.

It is an arithmetic number, because the mean of its divisors is an integer number (15500137275).

Almost surely, 2^211420243264 is an apocalyptic number.

It is an amenable number.

211420243264 is an abundant number, since it is smaller than the sum of its proper divisors (222583600436).

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

211420243264 is a wasteful number, since it uses less digits than its factorization.

211420243264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113911810 (or 113911800 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 211420243264 its reverse (462342024112), we get a palindrome (673762267376).

The spelling of 211420243264 in words is "two hundred eleven billion, four hundred twenty million, two hundred forty-three thousand, two hundred sixty-four".