211830485 has 4 divisors (see below), whose sum is σ = 254196588. Its totient is φ = 169464384.

The previous prime is 211830481. The next prime is 211830499. The reversal of 211830485 is 584038112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21362884 + 190467601 = 4622^2 + 13801^2 .

It is a cyclic number.

It is not a de Polignac number, because 211830485 - 2² = 211830481 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211830481) 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, 21183044 + ... + 21183053.

It is an arithmetic number, because the mean of its divisors is an integer number (63549147).

Almost surely, 2^211830485 is an apocalyptic number.

It is an amenable number.

211830485 is a deficient number, since it is larger than the sum of its proper divisors (42366103).

211830485 is an equidigital number, since it uses as much as digits as its factorization.

211830485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42366102.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 211830485 is about 14554.3974454458. The cubic root of 211830485 is about 596.1142269014.

Adding to 211830485 its reverse (584038112), we get a palindrome (795868597).

The spelling of 211830485 in words is "two hundred eleven million, eight hundred thirty thousand, four hundred eighty-five".