211028520949 has 4 divisors (see below), whose sum is σ = 211309518400. Its totient is φ = 210747523500.

The previous prime is 211028520931. The next prime is 211028520991. The reversal of 211028520949 is 949025820112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211028520949 - 2¹¹ = 211028518901 is a prime.

It is a super-3 number, since 3×211028520949³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211028523949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140497599 + ... + 140499100.

It is an arithmetic number, because the mean of its divisors is an integer number (52827379600).

Almost surely, 2^211028520949 is an apocalyptic number.

It is an amenable number.

211028520949 is a deficient number, since it is larger than the sum of its proper divisors (280997451).

211028520949 is an equidigital number, since it uses as much as digits as its factorization.

211028520949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280997450.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 211028520949 in words is "two hundred eleven billion, twenty-eight million, five hundred twenty thousand, nine hundred forty-nine".