211513241 has 2 divisors, whose sum is σ = 211513242. Its totient is φ = 211513240.

The previous prime is 211513231. The next prime is 211513249. The reversal of 211513241 is 142315112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134073241 + 77440000 = 11579^2 + 8800^2 .

It is a cyclic number.

It is not a de Polignac number, because 211513241 - 2⁶ = 211513177 is a prime.

It is a super-2 number, since 2×211513241² = 89475702236648162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211513249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105756620 + 105756621.

It is an arithmetic number, because the mean of its divisors is an integer number (105756621).

Almost surely, 2^211513241 is an apocalyptic number.

It is an amenable number.

211513241 is a deficient number, since it is larger than the sum of its proper divisors (1).

211513241 is an equidigital number, since it uses as much as digits as its factorization.

211513241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 20.

The square root of 211513241 is about 14543.4948000816. The cubic root of 211513241 is about 595.8164917447.

Adding to 211513241 its reverse (142315112), we get a palindrome (353828353).

The spelling of 211513241 in words is "two hundred eleven million, five hundred thirteen thousand, two hundred forty-one".