212540332165 has 32 divisors (see below), whose sum is σ = 294573210624. Its totient is φ = 144198144000.

The previous prime is 212540332153. The next prime is 212540332229. The reversal of 212540332165 is 561233045212.

It is not a de Polignac number, because 212540332165 - 2⁵ = 212540332133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212540332165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16123057 + ... + 16136233.

It is an arithmetic number, because the mean of its divisors is an integer number (9205412832).

Almost surely, 2^212540332165 is an apocalyptic number.

It is an amenable number.

212540332165 is a deficient number, since it is larger than the sum of its proper divisors (82032878459).

212540332165 is a wasteful number, since it uses less digits than its factorization.

212540332165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18037.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 212540332165 its reverse (561233045212), we get a palindrome (773773377377).

The spelling of 212540332165 in words is "two hundred twelve billion, five hundred forty million, three hundred thirty-two thousand, one hundred sixty-five".