211213424 has 20 divisors (see below), whose sum is σ = 430764840. Its totient is φ = 100048320.

The previous prime is 211213421. The next prime is 211213469. The reversal of 211213424 is 424312112.

211213424 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211213424² = 89222220955607552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211213396 and 211213405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211213421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347087 + ... + 347694.

It is an arithmetic number, because the mean of its divisors is an integer number (21538242).

Almost surely, 2^211213424 is an apocalyptic number.

It is an amenable number.

211213424 is an abundant number, since it is smaller than the sum of its proper divisors (219551416).

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

211213424 is a wasteful number, since it uses less digits than its factorization.

211213424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694808 (or 694802 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 211213424 is about 14533.1835466287. The cubic root of 211213424 is about 595.5348381653.

Adding to 211213424 its reverse (424312112), we get a palindrome (635525536).

The spelling of 211213424 in words is "two hundred eleven million, two hundred thirteen thousand, four hundred twenty-four".