211023 has 6 divisors (see below), whose sum is σ = 304824. Its totient is φ = 140676.

The previous prime is 211007. The next prime is 211039. The reversal of 211023 is 320112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211007) and next prime (211039).

It is not a de Polignac number, because 211023 - 2⁴ = 211007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 23447 = 211023 / (2 + 1 + 1 + 0 + 2 + 3).

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 210996 and 211014.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 211023.

It is not an unprimeable number, because it can be changed into a prime (211063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11715 + ... + 11732.

It is an arithmetic number, because the mean of its divisors is an integer number (50804).

2²¹¹⁰²³ is an apocalyptic number.

211023 is a deficient number, since it is larger than the sum of its proper divisors (93801).

211023 is a wasteful number, since it uses less digits than its factorization.

211023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23453 (or 23450 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 211023 is about 459.3723979518. The cubic root of 211023 is about 59.5355811944.

Adding to 211023 its reverse (320112), we get a palindrome (531135).

It can be divided in two parts, 2 and 11023, that added together give a square (11025 = 105²).

The spelling of 211023 in words is "two hundred eleven thousand, twenty-three", and thus it is an iban number.