215222452 has 6 divisors (see below), whose sum is σ = 376639298. Its totient is φ = 107611224.

The previous prime is 215222417. The next prime is 215222459. The reversal of 215222452 is 254222512.

It can be written as a sum of positive squares in only one way, i.e., 132848676 + 82373776 = 11526^2 + 9076^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215222459) 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, 26902803 + ... + 26902810.

Almost surely, 2^215222452 is an apocalyptic number.

It is an amenable number.

215222452 is a deficient number, since it is larger than the sum of its proper divisors (161416846).

215222452 is a wasteful number, since it uses less digits than its factorization.

215222452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53805617 (or 53805615 counting only the distinct ones).

The product of its digits is 3200, while the sum is 25.

The square root of 215222452 is about 14670.4618877525. The cubic root of 215222452 is about 599.2791825319.

Adding to 215222452 its reverse (254222512), we get a palindrome (469444964).

The spelling of 215222452 in words is "two hundred fifteen million, two hundred twenty-two thousand, four hundred fifty-two".