210838941556 has 12 divisors (see below), whose sum is σ = 369120820068. Its totient is φ = 105375850112.

The previous prime is 210838941553. The next prime is 210838941563. The reversal of 210838941556 is 655149838012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 200225821156 + 10613120400 = 447466^2 + 103020^2 .

It is a super-2 number, since 2×210838941556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210838941553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10894291 + ... + 10913626.

It is an arithmetic number, because the mean of its divisors is an integer number (30760068339).

Almost surely, 2^210838941556 is an apocalyptic number.

It is an amenable number.

210838941556 is a deficient number, since it is larger than the sum of its proper divisors (158281878512).

210838941556 is a wasteful number, since it uses less digits than its factorization.

210838941556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21810338 (or 21810336 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 210838941556 in words is "two hundred ten billion, eight hundred thirty-eight million, nine hundred forty-one thousand, five hundred fifty-six".