213322444 has 6 divisors (see below), whose sum is σ = 373314284. Its totient is φ = 106661220.

The previous prime is 213322397. The next prime is 213322457. The reversal of 213322444 is 444223312.

It is a happy number.

213322444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×213322444² = 91012930228266272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26665302 + ... + 26665309.

Almost surely, 2^213322444 is an apocalyptic number.

It is an amenable number.

213322444 is a deficient number, since it is larger than the sum of its proper divisors (159991840).

213322444 is a wasteful number, since it uses less digits than its factorization.

213322444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53330615 (or 53330613 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 213322444 is about 14605.5620912035. The cubic root of 213322444 is about 597.5104661367.

Adding to 213322444 its reverse (444223312), we get a palindrome (657545756).

The spelling of 213322444 in words is "two hundred thirteen million, three hundred twenty-two thousand, four hundred forty-four".