211331093 has 2 divisors, whose sum is σ = 211331094. Its totient is φ = 211331092.

The previous prime is 211331089. The next prime is 211331117. The reversal of 211331093 is 390133112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211324369 + 6724 = 14537^2 + 82^2 .

It is a cyclic number.

It is not a de Polignac number, because 211331093 - 2² = 211331089 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211331993) 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 as a sum of consecutive naturals, namely, 105665546 + 105665547.

It is an arithmetic number, because the mean of its divisors is an integer number (105665547).

Almost surely, 2^211331093 is an apocalyptic number.

It is an amenable number.

211331093 is a deficient number, since it is larger than the sum of its proper divisors (1).

211331093 is an equidigital number, since it uses as much as digits as its factorization.

211331093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 211331093 is about 14537.2312700872. The cubic root of 211331093 is about 595.6454103348.

It can be divided in two parts, 21133109 and 3, that added together give a palindrome (21133112).

The spelling of 211331093 in words is "two hundred eleven million, three hundred thirty-one thousand, ninety-three".