252216106 has 4 divisors (see below), whose sum is σ = 378324162. Its totient is φ = 126108052.

The previous prime is 252216101. The next prime is 252216119. The reversal of 252216106 is 601612252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 234365481 + 17850625 = 15309^2 + 4225^2 .

It is a super-2 number, since 2×252216106² = 127225928251606472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (252216101) 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, 63054025 + ... + 63054028.

Almost surely, 2^252216106 is an apocalyptic number.

252216106 is a deficient number, since it is larger than the sum of its proper divisors (126108056).

252216106 is a wasteful number, since it uses less digits than its factorization.

252216106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126108055.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 252216106 is about 15881.3131069191. The cubic root of 252216106 is about 631.8164641573.

Adding to 252216106 its reverse (601612252), we get a palindrome (853828358).

The spelling of 252216106 in words is "two hundred fifty-two million, two hundred sixteen thousand, one hundred six".