211023320 has 16 divisors (see below), whose sum is σ = 474802560. Its totient is φ = 84409312.

The previous prime is 211023313. The next prime is 211023331. The reversal of 211023320 is 23320112.

It is a happy number.

211023320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 211023295 and 211023304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2637752 + ... + 2637831.

It is an arithmetic number, because the mean of its divisors is an integer number (29675160).

Almost surely, 2^211023320 is an apocalyptic number.

211023320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211023320 is an abundant number, since it is smaller than the sum of its proper divisors (263779240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211023320 is a wasteful number, since it uses less digits than its factorization.

211023320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275594 (or 5275590 counting only the distinct ones).

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

The square root of 211023320 is about 14526.6417316598. The cubic root of 211023320 is about 595.3561128805.

Adding to 211023320 its reverse (23320112), we get a palindrome (234343432).

The spelling of 211023320 in words is "two hundred eleven million, twenty-three thousand, three hundred twenty".