211431033 has 16 divisors (see below), whose sum is σ = 341707200. Its totient is φ = 128139840.

The previous prime is 211430977. The next prime is 211431047. The reversal of 211431033 is 330134112.

It is not a de Polignac number, because 211431033 - 2⁶ = 211430969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211430997 and 211431015.

It is not an unprimeable number, because it can be changed into a prime (211431133) 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, 355648 + ... + 356241.

It is an arithmetic number, because the mean of its divisors is an integer number (21356700).

Almost surely, 2^211431033 is an apocalyptic number.

It is an amenable number.

211431033 is a deficient number, since it is larger than the sum of its proper divisors (130276167).

211431033 is a wasteful number, since it uses less digits than its factorization.

211431033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711909 (or 711903 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 211431033 is about 14540.6682446165. The cubic root of 211431033 is about 595.7392905428.

Adding to 211431033 its reverse (330134112), we get a palindrome (541565145).

The spelling of 211431033 in words is "two hundred eleven million, four hundred thirty-one thousand, thirty-three".