252217634 has 8 divisors (see below), whose sum is σ = 382577580. Its totient is φ = 124691776.

The previous prime is 252217577. The next prime is 252217639. The reversal of 252217634 is 436712252.

It can be written as a sum of positive squares in 2 ways, for example, as 235530409 + 16687225 = 15347^2 + 4085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×252217634² = 127227469801115912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 252217634.

It is not an unprimeable number, because it can be changed into a prime (252217639) 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, 708299 + ... + 708654.

Almost surely, 2^252217634 is an apocalyptic number.

252217634 is a deficient number, since it is larger than the sum of its proper divisors (130359946).

252217634 is a wasteful number, since it uses less digits than its factorization.

252217634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417044.

The product of its digits is 20160, while the sum is 32.

The square root of 252217634 is about 15881.3612136995. The cubic root of 252217634 is about 631.8177400652.

Adding to 252217634 its reverse (436712252), we get a palindrome (688929886).

The spelling of 252217634 in words is "two hundred fifty-two million, two hundred seventeen thousand, six hundred thirty-four".