211247992993 has 8 divisors (see below), whose sum is σ = 229129818120. Its totient is φ = 193972331520.

The previous prime is 211247992951. The next prime is 211247993009. The reversal of 211247992993 is 399299742112.

It can be written as a sum of positive squares in 4 ways, for example, as 2333179809 + 208914813184 = 48303^2 + 457072^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211247992993 - 2²⁹ = 210711122081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211247992393) 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 7 ways as a sum of consecutive naturals, for example, 151540188 + ... + 151541581.

It is an arithmetic number, because the mean of its divisors is an integer number (28641227265).

Almost surely, 2^211247992993 is an apocalyptic number.

It is an amenable number.

211247992993 is a deficient number, since it is larger than the sum of its proper divisors (17881825127).

211247992993 is a wasteful number, since it uses less digits than its factorization.

211247992993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303081827.

The product of its digits is 4408992, while the sum is 58.

The spelling of 211247992993 in words is "two hundred eleven billion, two hundred forty-seven million, nine hundred ninety-two thousand, nine hundred ninety-three".