211019957 has 2 divisors, whose sum is σ = 211019958. Its totient is φ = 211019956.

The previous prime is 211019951. The next prime is 211019959. The reversal of 211019957 is 759910112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208542481 + 2477476 = 14441^2 + 1574^2 .

It is a cyclic number.

It is not a de Polignac number, because 211019957 - 2⁸ = 211019701 is a prime.

Together with 211019959, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211019951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105509978 + 105509979.

It is an arithmetic number, because the mean of its divisors is an integer number (105509979).

Almost surely, 2^211019957 is an apocalyptic number.

It is an amenable number.

211019957 is a deficient number, since it is larger than the sum of its proper divisors (1).

211019957 is an equidigital number, since it uses as much as digits as its factorization.

211019957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 35.

The square root of 211019957 is about 14526.5259783611. The cubic root of 211019957 is about 595.3529502076.

The spelling of 211019957 in words is "two hundred eleven million, nineteen thousand, nine hundred fifty-seven".