211813053 has 4 divisors (see below), whose sum is σ = 282417408. Its totient is φ = 141208700.

The previous prime is 211813039. The next prime is 211813057. The reversal of 211813053 is 350318112.

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 211813053 - 2⁴ = 211813037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211813057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35302173 + ... + 35302178.

It is an arithmetic number, because the mean of its divisors is an integer number (70604352).

Almost surely, 2^211813053 is an apocalyptic number.

It is an amenable number.

211813053 is a deficient number, since it is larger than the sum of its proper divisors (70604355).

211813053 is an equidigital number, since it uses as much as digits as its factorization.

211813053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70604354.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 211813053 is about 14553.7985763168. The cubic root of 211813053 is about 596.0978745993.

The spelling of 211813053 in words is "two hundred eleven million, eight hundred thirteen thousand, fifty-three".