211016761 has 2 divisors, whose sum is σ = 211016762. Its totient is φ = 211016760.

The previous prime is 211016753. The next prime is 211016833. The reversal of 211016761 is 167610112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168506361 + 42510400 = 12981^2 + 6520^2 .

It is a cyclic number.

It is not a de Polignac number, because 211016761 - 2³ = 211016753 is a prime.

It is a super-2 number, since 2×211016761² = 89056146845862242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211017761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105508380 + 105508381.

It is an arithmetic number, because the mean of its divisors is an integer number (105508381).

Almost surely, 2^211016761 is an apocalyptic number.

It is an amenable number.

211016761 is a deficient number, since it is larger than the sum of its proper divisors (1).

211016761 is an equidigital number, since it uses as much as digits as its factorization.

211016761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 211016761 is about 14526.4159722899. The cubic root of 211016761 is about 595.3499445556.

Adding to 211016761 its reverse (167610112), we get a palindrome (378626873).

The spelling of 211016761 in words is "two hundred eleven million, sixteen thousand, seven hundred sixty-one".