211523113 has 2 divisors, whose sum is σ = 211523114. Its totient is φ = 211523112.

The previous prime is 211523101. The next prime is 211523153. The reversal of 211523113 is 311325112.

211523113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189695529 + 21827584 = 13773^2 + 4672^2 .

It is a cyclic number.

It is not a de Polignac number, because 211523113 - 2⁹ = 211522601 is a prime.

It is equal to p_11681020 and since 211523113 and 11681020 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (211523153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105761556 + 105761557.

It is an arithmetic number, because the mean of its divisors is an integer number (105761557).

Almost surely, 2^211523113 is an apocalyptic number.

It is an amenable number.

211523113 is a deficient number, since it is larger than the sum of its proper divisors (1).

211523113 is an equidigital number, since it uses as much as digits as its factorization.

211523113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 211523113 is about 14543.8341918491. The cubic root of 211523113 is about 595.8257611548.

Adding to 211523113 its reverse (311325112), we get a palindrome (522848225).

The spelling of 211523113 in words is "two hundred eleven million, five hundred twenty-three thousand, one hundred thirteen".