213222544 has 10 divisors (see below), whose sum is σ = 413118710. Its totient is φ = 106611264.

The previous prime is 213222523. The next prime is 213222547. The reversal of 213222544 is 445222312.

It can be written as a sum of positive squares in only one way, i.e., 210598144 + 2624400 = 14512^2 + 1620^2 .

It is not an unprimeable number, because it can be changed into a prime (213222547) by changing a digit.

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, 6663189 + ... + 6663220.

It is an arithmetic number, because the mean of its divisors is an integer number (41311871).

Almost surely, 2^213222544 is an apocalyptic number.

It is an amenable number.

213222544 is a deficient number, since it is larger than the sum of its proper divisors (199896166).

213222544 is a wasteful number, since it uses less digits than its factorization.

213222544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13326417 (or 13326411 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 213222544 is about 14602.1417607144. The cubic root of 213222544 is about 597.4171791626.

Adding to 213222544 its reverse (445222312), we get a palindrome (658444856).

The spelling of 213222544 in words is "two hundred thirteen million, two hundred twenty-two thousand, five hundred forty-four".