211312230 has 32 divisors (see below), whose sum is σ = 508292064. Its totient is φ = 56222976.

The previous prime is 211312223. The next prime is 211312249. The reversal of 211312230 is 32213112.

211312230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6004 + ... + 21416.

It is an arithmetic number, because the mean of its divisors is an integer number (15884127).

Almost surely, 2^211312230 is an apocalyptic number.

211312230 is an abundant number, since it is smaller than the sum of its proper divisors (296979834).

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

211312230 is a wasteful number, since it uses less digits than its factorization.

211312230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15880.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 211312230 is about 14536.5824731950. The cubic root of 211312230 is about 595.6276877594.

Adding to 211312230 its reverse (32213112), we get a palindrome (243525342).

The spelling of 211312230 in words is "two hundred eleven million, three hundred twelve thousand, two hundred thirty".