211230822 has 32 divisors (see below), whose sum is σ = 467368704. Its totient is φ = 63106400.

The previous prime is 211230793. The next prime is 211230839. The reversal of 211230822 is 228032112.

It is a happy number.

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, 17853 + ... + 27224.

It is an arithmetic number, because the mean of its divisors is an integer number (14605272).

Almost surely, 2^211230822 is an apocalyptic number.

211230822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211230822 is an abundant number, since it is smaller than the sum of its proper divisors (256137882).

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

211230822 is a wasteful number, since it uses less digits than its factorization.

211230822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45164.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 211230822 is about 14533.7820955180. The cubic root of 211230822 is about 595.5511894471.

Adding to 211230822 its reverse (228032112), we get a palindrome (439262934).

The spelling of 211230822 in words is "two hundred eleven million, two hundred thirty thousand, eight hundred twenty-two".