213222424 has 8 divisors (see below), whose sum is σ = 399792060. Its totient is φ = 106611208.

The previous prime is 213222407. The next prime is 213222437. The reversal of 213222424 is 424222312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 213222395 and 213222404.

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 as a sum of consecutive naturals, namely, 13326394 + ... + 13326409.

Almost surely, 2^213222424 is an apocalyptic number.

It is an amenable number.

213222424 is a deficient number, since it is larger than the sum of its proper divisors (186569636).

213222424 is a wasteful number, since it uses less digits than its factorization.

213222424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26652809 (or 26652805 counting only the distinct ones).

The product of its digits is 1536, while the sum is 22.

The square root of 213222424 is about 14602.1376517276. The cubic root of 213222424 is about 597.4170670887.

Adding to 213222424 its reverse (424222312), we get a palindrome (637444736).

The spelling of 213222424 in words is "two hundred thirteen million, two hundred twenty-two thousand, four hundred twenty-four".