252256243247 has 4 divisors (see below), whose sum is σ = 252392821296. Its totient is φ = 252119665200.

The previous prime is 252256243241. The next prime is 252256243289. The reversal of 252256243247 is 742342652252.

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

It is a cyclic number.

It is not a de Polignac number, because 252256243247 - 2¹⁰ = 252256242223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252256243198 and 252256243207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252256243241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68286254 + ... + 68289947.

It is an arithmetic number, because the mean of its divisors is an integer number (63098205324).

Almost surely, 2^252256243247 is an apocalyptic number.

252256243247 is a deficient number, since it is larger than the sum of its proper divisors (136578049).

252256243247 is a wasteful number, since it uses less digits than its factorization.

252256243247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136578048.

The product of its digits is 1612800, while the sum is 44.

Adding to 252256243247 its reverse (742342652252), we get a palindrome (994598895499).

The spelling of 252256243247 in words is "two hundred fifty-two billion, two hundred fifty-six million, two hundred forty-three thousand, two hundred forty-seven".