252643343346253 has 4 divisors (see below), whose sum is σ = 252646544318940. Its totient is φ = 252640142373568.

The previous prime is 252643343346193. The next prime is 252643343346293. The reversal of 252643343346253 is 352643343346252.

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 173215000687689 + 79428342658564 = 13161117^2 + 8912258^2 .

It is a cyclic number.

It is not a de Polignac number, because 252643343346253 - 2¹⁷ = 252643343215181 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252643343346194 and 252643343346203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252643343346293) 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, 1600367950 + ... + 1600525807.

It is an arithmetic number, because the mean of its divisors is an integer number (63161636079735).

Almost surely, 2^{252643343346253} is an apocalyptic number.

It is an amenable number.

252643343346253 is a deficient number, since it is larger than the sum of its proper divisors (3200972687).

252643343346253 is an equidigital number, since it uses as much as digits as its factorization.

252643343346253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200972686.

The product of its digits is 111974400, while the sum is 55.

Subtracting 252643343346253 from its reverse (352643343346252), we obtain a palindrome (99999999999999).

The spelling of 252643343346253 in words is "two hundred fifty-two trillion, six hundred forty-three billion, three hundred forty-three million, three hundred forty-six thousand, two hundred fifty-three".