211203023 has 4 divisors (see below), whose sum is σ = 211233240. Its totient is φ = 211172808.

The previous prime is 211202987. The next prime is 211203049. The reversal of 211203023 is 320302112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 211203023 - 2²² = 207008719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211202989 and 211203007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211203623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361 + ... + 20597.

It is an arithmetic number, because the mean of its divisors is an integer number (52808310).

Almost surely, 2^211203023 is an apocalyptic number.

211203023 is a deficient number, since it is larger than the sum of its proper divisors (30217).

211203023 is a wasteful number, since it uses less digits than its factorization.

211203023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30216.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 211203023 is about 14532.8257059665. The cubic root of 211203023 is about 595.5250624932.

Adding to 211203023 its reverse (320302112), we get a palindrome (531505135).

The spelling of 211203023 in words is "two hundred eleven million, two hundred three thousand, twenty-three".