211542350406 has 32 divisors (see below), whose sum is σ = 431211338208. Its totient is φ = 69160565760.

The previous prime is 211542350389. The next prime is 211542350419. The reversal of 211542350406 is 604053245112.

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, 856246 + ... + 1075286.

It is an arithmetic number, because the mean of its divisors is an integer number (13475354319).

Almost surely, 2^211542350406 is an apocalyptic number.

211542350406 is an abundant number, since it is smaller than the sum of its proper divisors (219668987802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211542350406 is a wasteful number, since it uses less digits than its factorization.

211542350406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222136.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 211542350406 its reverse (604053245112), we get a palindrome (815595595518).

The spelling of 211542350406 in words is "two hundred eleven billion, five hundred forty-two million, three hundred fifty thousand, four hundred six".