211109953 has 2 divisors, whose sum is σ = 211109954. Its totient is φ = 211109952.

The previous prime is 211109917. The next prime is 211109957. The reversal of 211109953 is 359901112.

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., 204261264 + 6848689 = 14292^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 211109953 - 2¹⁷ = 210978881 is a prime.

It is not a weakly prime, because it can be changed into another prime (211109957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105554976 + 105554977.

It is an arithmetic number, because the mean of its divisors is an integer number (105554977).

Almost surely, 2^211109953 is an apocalyptic number.

It is an amenable number.

211109953 is a deficient number, since it is larger than the sum of its proper divisors (1).

211109953 is an equidigital number, since it uses as much as digits as its factorization.

211109953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 211109953 is about 14529.6232917444. The cubic root of 211109953 is about 595.4375737503.

The spelling of 211109953 in words is "two hundred eleven million, one hundred nine thousand, nine hundred fifty-three".