211423420233 has 24 divisors (see below), whose sum is σ = 309365384328. Its totient is φ = 139121667072.

The previous prime is 211423420181. The next prime is 211423420319. The reversal of 211423420233 is 332024324112.

211423420233 is a `hidden beast` number, since 2 + 1 + 1 + 4 + 2 + 3 + 420 + 233 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 52774953984 + 158648466249 = 229728^2 + 398307^2 .

It is not a de Polignac number, because 211423420233 - 2³⁶ = 142703943497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211423420197 and 211423420206.

It is not an unprimeable number, because it can be changed into a prime (211423422233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 991 + ... + 650267.

It is an arithmetic number, because the mean of its divisors is an integer number (12890224347).

Almost surely, 2^211423420233 is an apocalyptic number.

It is an amenable number.

211423420233 is a deficient number, since it is larger than the sum of its proper divisors (97941964095).

211423420233 is a wasteful number, since it uses less digits than its factorization.

211423420233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649753 (or 649750 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 211423420233 its reverse (332024324112), we get a palindrome (543447744345).

The spelling of 211423420233 in words is "two hundred eleven billion, four hundred twenty-three million, four hundred twenty thousand, two hundred thirty-three".