211223152 has 40 divisors (see below), whose sum is σ = 492329600. Its totient is φ = 85758912.

The previous prime is 211223137. The next prime is 211223231. The reversal of 211223152 is 251322112.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47502 + ... + 51757.

It is an arithmetic number, because the mean of its divisors is an integer number (12308240).

Almost surely, 2^211223152 is an apocalyptic number.

It is an amenable number.

211223152 is an abundant number, since it is smaller than the sum of its proper divisors (281106448).

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

211223152 is a wasteful number, since it uses less digits than its factorization.

211223152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99293 (or 99287 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 211223152 is about 14533.5182251236. The cubic root of 211223152 is about 595.5439810090.

Adding to 211223152 its reverse (251322112), we get a palindrome (462545264).

The spelling of 211223152 in words is "two hundred eleven million, two hundred twenty-three thousand, one hundred fifty-two".