211223420 has 24 divisors (see below), whose sum is σ = 445435200. Its totient is φ = 84133952.

The previous prime is 211223413. The next prime is 211223471. The reversal of 211223420 is 24322112.

211223420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 17315 + ... + 26874.

It is an arithmetic number, because the mean of its divisors is an integer number (18559800).

Almost surely, 2^211223420 is an apocalyptic number.

211223420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211223420 is an abundant number, since it is smaller than the sum of its proper divisors (234211780).

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

211223420 is a wasteful number, since it uses less digits than its factorization.

211223420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44437 (or 44435 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 211223420 is about 14533.5274451869. The cubic root of 211223420 is about 595.5442328844.

Adding to 211223420 its reverse (24322112), we get a palindrome (235545532).

It can be divided in two parts, 21122 and 3420, that added together give a palindrome (24542).

The spelling of 211223420 in words is "two hundred eleven million, two hundred twenty-three thousand, four hundred twenty".