252544220345 has 4 divisors (see below), whose sum is σ = 303053064420. Its totient is φ = 202035376272.

The previous prime is 252544220321. The next prime is 252544220347. The reversal of 252544220345 is 543022445252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67324161961 + 185220058384 = 259469^2 + 430372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252544220345 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252544220299 and 252544220308.

It is not an unprimeable number, because it can be changed into a prime (252544220347) 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, 25254422030 + ... + 25254422039.

It is an arithmetic number, because the mean of its divisors is an integer number (75763266105).

Almost surely, 2^252544220345 is an apocalyptic number.

It is an amenable number.

252544220345 is a deficient number, since it is larger than the sum of its proper divisors (50508844075).

252544220345 is an equidigital number, since it uses as much as digits as its factorization.

252544220345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50508844074.

The product of its (nonzero) digits is 384000, while the sum is 38.

Adding to 252544220345 its reverse (543022445252), we get a palindrome (795566665597).

The spelling of 252544220345 in words is "two hundred fifty-two billion, five hundred forty-four million, two hundred twenty thousand, three hundred forty-five".