211477117 has 2 divisors, whose sum is σ = 211477118. Its totient is φ = 211477116.

The previous prime is 211477109. The next prime is 211477129. The reversal of 211477117 is 711774112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207965241 + 3511876 = 14421^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 211477117 - 2³ = 211477109 is a prime.

It is equal to p_11678620 and since 211477117 and 11678620 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 (211477187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105738558 + 105738559.

It is an arithmetic number, because the mean of its divisors is an integer number (105738559).

Almost surely, 2^211477117 is an apocalyptic number.

It is an amenable number.

211477117 is a deficient number, since it is larger than the sum of its proper divisors (1).

211477117 is an equidigital number, since it uses as much as digits as its factorization.

211477117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2744, while the sum is 31.

The square root of 211477117 is about 14542.2528172220. The cubic root of 211477117 is about 595.7825703059.

The spelling of 211477117 in words is "two hundred eleven million, four hundred seventy-seven thousand, one hundred seventeen".