211241957 has 2 divisors, whose sum is σ = 211241958. Its totient is φ = 211241956.

The previous prime is 211241951. The next prime is 211242001. The reversal of 211241957 is 759142112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172291876 + 38950081 = 13126^2 + 6241^2 .

It is a cyclic number.

It is not a de Polignac number, because 211241957 - 2⁶ = 211241893 is a prime.

It is a Chen prime.

It is equal to p_11666273 and since 211241957 and 11666273 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211241951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105620978 + 105620979.

It is an arithmetic number, because the mean of its divisors is an integer number (105620979).

Almost surely, 2^211241957 is an apocalyptic number.

It is an amenable number.

211241957 is a deficient number, since it is larger than the sum of its proper divisors (1).

211241957 is an equidigital number, since it uses as much as digits as its factorization.

211241957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 32.

The square root of 211241957 is about 14534.1651635035. The cubic root of 211241957 is about 595.5616540594.

The spelling of 211241957 in words is "two hundred eleven million, two hundred forty-one thousand, nine hundred fifty-seven".