252216042 has 32 divisors (see below), whose sum is σ = 544931520. Its totient is φ = 77362560.

The previous prime is 252215963. The next prime is 252216047. The reversal of 252216042 is 240612252.

It is a happy number.

It is a super-2 number, since 2×252216042² = 127225863684291528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (252216047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20934 + ... + 30702.

It is an arithmetic number, because the mean of its divisors is an integer number (17029110).

Almost surely, 2^252216042 is an apocalyptic number.

252216042 is an abundant number, since it is smaller than the sum of its proper divisors (292715478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252216042 is a wasteful number, since it uses less digits than its factorization.

252216042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10118.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 252216042 is about 15881.3110919722. The cubic root of 252216042 is about 631.8164107160.

Adding to 252216042 its reverse (240612252), we get a palindrome (492828294).

The spelling of 252216042 in words is "two hundred fifty-two million, two hundred sixteen thousand, forty-two".