211055613 has 16 divisors (see below), whose sum is σ = 294752256. Its totient is φ = 134077680.

The previous prime is 211055539. The next prime is 211055623. The reversal of 211055613 is 316550112.

It is not a de Polignac number, because 211055613 - 2¹⁰ = 211054589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211055623) 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 15 ways as a sum of consecutive naturals, for example, 13056 + ... + 24342.

It is an arithmetic number, because the mean of its divisors is an integer number (18422016).

Almost surely, 2^211055613 is an apocalyptic number.

211055613 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

211055613 is a deficient number, since it is larger than the sum of its proper divisors (83696643).

211055613 is a wasteful number, since it uses less digits than its factorization.

211055613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11584.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 211055613 is about 14527.7531986195. The cubic root of 211055613 is about 595.3864805421.

The spelling of 211055613 in words is "two hundred eleven million, fifty-five thousand, six hundred thirteen".