211551030513 has 6 divisors (see below), whose sum is σ = 305573710754. Its totient is φ = 141034020336.

The previous prime is 211551030479. The next prime is 211551030527. The reversal of 211551030513 is 315030155112.

211551030513 is a `hidden beast` number, since 2 + 115 + 5 + 1 + 0 + 30 + 513 = 666.

It can be written as a sum of positive squares in only one way, i.e., 164265658209 + 47285372304 = 405297^2 + 217452^2 .

It is not a de Polignac number, because 211551030513 - 2¹² = 211551026417 is a prime.

It is a super-2 number, since 2×211551030513² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211551037513) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 11752835020 + ... + 11752835037.

Almost surely, 2^211551030513 is an apocalyptic number.

It is an amenable number.

211551030513 is a deficient number, since it is larger than the sum of its proper divisors (94022680241).

211551030513 is a wasteful number, since it uses less digits than its factorization.

211551030513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23505670063 (or 23505670060 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

Adding to 211551030513 its reverse (315030155112), we get a palindrome (526581185625).

The spelling of 211551030513 in words is "two hundred eleven billion, five hundred fifty-one million, thirty thousand, five hundred thirteen".