213221152 has 24 divisors (see below), whose sum is σ = 420165900. Its totient is φ = 106512384.

The previous prime is 213221149. The next prime is 213221153. The reversal of 213221152 is 251122312.

It can be written as a sum of positive squares in 2 ways, for example, as 133726096 + 79495056 = 11564^2 + 8916^2 .

It is not an unprimeable number, because it can be changed into a prime (213221153) 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, 42724 + ... + 47452.

Almost surely, 2^213221152 is an apocalyptic number.

It is an amenable number.

213221152 is a deficient number, since it is larger than the sum of its proper divisors (206944748).

213221152 is a wasteful number, since it uses less digits than its factorization.

213221152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6148 (or 6140 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 213221152 is about 14602.0940963959. The cubic root of 213221152 is about 597.4158791023.

Adding to 213221152 its reverse (251122312), we get a palindrome (464343464).

The spelling of 213221152 in words is "two hundred thirteen million, two hundred twenty-one thousand, one hundred fifty-two".