213222444444 has 48 divisors (see below), whose sum is σ = 585316519200. Its totient is φ = 66893315328.

The previous prime is 213222444437. The next prime is 213222444451. The reversal of 213222444444 is 444444222312.

It is an interprime number because it is at equal distance from previous prime (213222444437) and next prime (213222444451).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 213222444399 and 213222444408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58065279 + ... + 58068950.

It is an arithmetic number, because the mean of its divisors is an integer number (12194094150).

Almost surely, 2^213222444444 is an apocalyptic number.

It is an amenable number.

213222444444 is an abundant number, since it is smaller than the sum of its proper divisors (372094074756).

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

213222444444 is a wasteful number, since it uses less digits than its factorization.

213222444444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116134259 (or 116134251 counting only the distinct ones).

The product of its digits is 196608, while the sum is 36.

Adding to 213222444444 its reverse (444444222312), we get a palindrome (657666666756).

The spelling of 213222444444 in words is "two hundred thirteen billion, two hundred twenty-two million, four hundred forty-four thousand, four hundred forty-four".