211057513 has 2 divisors, whose sum is σ = 211057514. Its totient is φ = 211057512.

The previous prime is 211057487. The next prime is 211057523. The reversal of 211057513 is 315750112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209323024 + 1734489 = 14468^2 + 1317^2 .

It is a cyclic number.

It is not a de Polignac number, because 211057513 - 2⁹ = 211057001 is a prime.

It is not a weakly prime, because it can be changed into another prime (211057523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105528756 + 105528757.

It is an arithmetic number, because the mean of its divisors is an integer number (105528757).

Almost surely, 2^211057513 is an apocalyptic number.

It is an amenable number.

211057513 is a deficient number, since it is larger than the sum of its proper divisors (1).

211057513 is an equidigital number, since it uses as much as digits as its factorization.

211057513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 211057513 is about 14527.8185905524. The cubic root of 211057513 is about 595.3882671659.

The spelling of 211057513 in words is "two hundred eleven million, fifty-seven thousand, five hundred thirteen".