211515053 has 2 divisors, whose sum is σ = 211515054. Its totient is φ = 211515052.

The previous prime is 211515013. The next prime is 211515079. The reversal of 211515053 is 350515112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191462569 + 20052484 = 13837^2 + 4478^2 .

It is a cyclic number.

It is not a de Polignac number, because 211515053 - 2¹⁴ = 211498669 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 (211515013) 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, 105757526 + 105757527.

It is an arithmetic number, because the mean of its divisors is an integer number (105757527).

Almost surely, 2^211515053 is an apocalyptic number.

It is an amenable number.

211515053 is a deficient number, since it is larger than the sum of its proper divisors (1).

211515053 is an equidigital number, since it uses as much as digits as its factorization.

211515053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 211515053 is about 14543.5570958414. The cubic root of 211515053 is about 595.8181931613.

The spelling of 211515053 in words is "two hundred eleven million, five hundred fifteen thousand, fifty-three".