211315312240165 has 16 divisors (see below), whose sum is σ = 295969896294912. Its totient is φ = 141818908639104.

The previous prime is 211315312240129. The next prime is 211315312240177. The reversal of 211315312240165 is 561042213513112.

It is a cyclic number.

It is not a de Polignac number, because 211315312240165 - 2⁷ = 211315312240037 is a prime.

It is a super-2 number, since 2×211315312240165² (a number of 29 digits) contains 22 as substring.

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, 64229576544 + ... + 64229579833.

It is an arithmetic number, because the mean of its divisors is an integer number (18498118518432).

Almost surely, 2^{211315312240165} is an apocalyptic number.

It is an amenable number.

211315312240165 is a deficient number, since it is larger than the sum of its proper divisors (84654584054747).

211315312240165 is a wasteful number, since it uses less digits than its factorization.

211315312240165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128459156436.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 211315312240165 its reverse (561042213513112), we get a palindrome (772357525753277).

The spelling of 211315312240165 in words is "two hundred eleven trillion, three hundred fifteen billion, three hundred twelve million, two hundred forty thousand, one hundred sixty-five".