211617245 has 16 divisors (see below), whose sum is σ = 298063488. Its totient is φ = 141186240.

The previous prime is 211617239. The next prime is 211617251. The reversal of 211617245 is 542716112.

It is an interprime number because it is at equal distance from previous prime (211617239) and next prime (211617251).

It is not a de Polignac number, because 211617245 - 2⁴ = 211617229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80411 + ... + 83000.

It is an arithmetic number, because the mean of its divisors is an integer number (18628968).

Almost surely, 2^211617245 is an apocalyptic number.

It is an amenable number.

211617245 is a deficient number, since it is larger than the sum of its proper divisors (86446243).

211617245 is a wasteful number, since it uses less digits than its factorization.

211617245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163460.

The product of its digits is 3360, while the sum is 29.

The square root of 211617245 is about 14547.0699798963. The cubic root of 211617245 is about 595.9141328257.

The spelling of 211617245 in words is "two hundred eleven million, six hundred seventeen thousand, two hundred forty-five".