211404342331 has 8 divisors (see below), whose sum is σ = 260189959904. Its totient is φ = 167264974080.

The previous prime is 211404342269. The next prime is 211404342349. The reversal of 211404342331 is 133243404112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 211404342331 - 2¹⁵ = 211404309563 is a prime.

It is a super-2 number, since 2×211404342331² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211404342331.

It is not an unprimeable number, because it can be changed into a prime (211404342031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1161562230 + ... + 1161562411.

It is an arithmetic number, because the mean of its divisors is an integer number (32523744988).

Almost surely, 2^211404342331 is an apocalyptic number.

211404342331 is a deficient number, since it is larger than the sum of its proper divisors (48785617573).

211404342331 is a wasteful number, since it uses less digits than its factorization.

211404342331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323124661.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 211404342331 its reverse (133243404112), we get a palindrome (344647746443).

The spelling of 211404342331 in words is "two hundred eleven billion, four hundred four million, three hundred forty-two thousand, three hundred thirty-one".