211313433231 has 16 divisors (see below), whose sum is σ = 313590278400. Its totient is φ = 140635619064.

The previous prime is 211313433209. The next prime is 211313433241. The reversal of 211313433231 is 132334313112.

211313433231 is a `hidden beast` number, since 2 + 11 + 313 + 4 + 332 + 3 + 1 = 666.

It is not a de Polignac number, because 211313433231 - 2²⁷ = 211179215503 is a prime.

It is a super-2 number, since 2×211313433231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 211313433195 and 211313433204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211313433241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6650611 + ... + 6682308.

It is an arithmetic number, because the mean of its divisors is an integer number (19599392400).

Almost surely, 2^211313433231 is an apocalyptic number.

211313433231 is a deficient number, since it is larger than the sum of its proper divisors (102276845169).

211313433231 is a wasteful number, since it uses less digits than its factorization.

211313433231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13333515 (or 13333509 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 211313433231 its reverse (132334313112), we get a palindrome (343647746343).

The spelling of 211313433231 in words is "two hundred eleven billion, three hundred thirteen million, four hundred thirty-three thousand, two hundred thirty-one".