211343057 has 4 divisors (see below), whose sum is σ = 211393956. Its totient is φ = 211292160.

The previous prime is 211343051. The next prime is 211343071. The reversal of 211343057 is 750343112.

211343057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 81018001 + 130325056 = 9001^2 + 11416^2 .

It is a cyclic number.

It is not a de Polignac number, because 211343057 - 2⁸ = 211342801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211343051) 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, 18608 + ... + 27729.

It is an arithmetic number, because the mean of its divisors is an integer number (52848489).

Almost surely, 2^211343057 is an apocalyptic number.

It is an amenable number.

211343057 is a deficient number, since it is larger than the sum of its proper divisors (50899).

211343057 is an equidigital number, since it uses as much as digits as its factorization.

211343057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50898.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 211343057 is about 14537.6427594022. The cubic root of 211343057 is about 595.6566504654.

Adding to 211343057 its reverse (750343112), we get a palindrome (961686169).

The spelling of 211343057 in words is "two hundred eleven million, three hundred forty-three thousand, fifty-seven".