211731053 has 2 divisors, whose sum is σ = 211731054. Its totient is φ = 211731052.

The previous prime is 211731029. The next prime is 211731103. The reversal of 211731053 is 350137112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206726884 + 5004169 = 14378^2 + 2237^2 .

It is a cyclic number.

It is not a de Polignac number, because 211731053 - 2⁶ = 211730989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211731253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105865526 + 105865527.

It is an arithmetic number, because the mean of its divisors is an integer number (105865527).

Almost surely, 2^211731053 is an apocalyptic number.

It is an amenable number.

211731053 is a deficient number, since it is larger than the sum of its proper divisors (1).

211731053 is an equidigital number, since it uses as much as digits as its factorization.

211731053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 211731053 is about 14550.9811696669. The cubic root of 211731053 is about 596.0209414515.

Adding to 211731053 its reverse (350137112), we get a palindrome (561868165).

The spelling of 211731053 in words is "two hundred eleven million, seven hundred thirty-one thousand, fifty-three".