211530503320 has 32 divisors (see below), whose sum is σ = 475990466400. Its totient is φ = 84603875328.

The previous prime is 211530503291. The next prime is 211530503357. The reversal of 211530503320 is 23305035112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159757 + ... + 669763.

It is an arithmetic number, because the mean of its divisors is an integer number (14874702075).

Almost surely, 2^211530503320 is an apocalyptic number.

211530503320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211530503320 is an abundant number, since it is smaller than the sum of its proper divisors (264459963080).

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

211530503320 is a wasteful number, since it uses less digits than its factorization.

211530503320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520387 (or 520383 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 211530503320 its reverse (23305035112), we get a palindrome (234835538432).

The spelling of 211530503320 in words is "two hundred eleven billion, five hundred thirty million, five hundred three thousand, three hundred twenty".