205216111265 has 8 divisors (see below), whose sum is σ = 268646545728. Its totient is φ = 149248080880.

The previous prime is 205216111231. The next prime is 205216111271. The reversal of 205216111265 is 562111612502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205216111265 - 2¹⁰ = 205216110241 is a prime.

It is a super-2 number, since 2×205216111265² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1865600957 + ... + 1865601066.

It is an arithmetic number, because the mean of its divisors is an integer number (33580818216).

Almost surely, 2^205216111265 is an apocalyptic number.

It is an amenable number.

205216111265 is a deficient number, since it is larger than the sum of its proper divisors (63430434463).

205216111265 is a wasteful number, since it uses less digits than its factorization.

205216111265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3731202039.

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 205216111265 its reverse (562111612502), we get a palindrome (767327723767).

The spelling of 205216111265 in words is "two hundred five billion, two hundred sixteen million, one hundred eleven thousand, two hundred sixty-five".