252144421211 has 4 divisors (see below), whose sum is σ = 252209394024. Its totient is φ = 252079448400.

The previous prime is 252144421189. The next prime is 252144421223. The reversal of 252144421211 is 112124441252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252144421211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252144421241) 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, 32480585 + ... + 32488346.

It is an arithmetic number, because the mean of its divisors is an integer number (63052348506).

Almost surely, 2^252144421211 is an apocalyptic number.

252144421211 is a deficient number, since it is larger than the sum of its proper divisors (64972813).

252144421211 is an equidigital number, since it uses as much as digits as its factorization.

252144421211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64972812.

The product of its digits is 5120, while the sum is 29.

Adding to 252144421211 its reverse (112124441252), we get a palindrome (364268862463).

The spelling of 252144421211 in words is "two hundred fifty-two billion, one hundred forty-four million, four hundred twenty-one thousand, two hundred eleven".