505543253 has 4 divisors (see below), whose sum is σ = 505777440. Its totient is φ = 505309068.

The previous prime is 505543231. The next prime is 505543271. The reversal of 505543253 is 352345505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505543253 - 2⁶ = 505543189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505543273) 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, 113825 + ... + 118182.

It is an arithmetic number, because the mean of its divisors is an integer number (126444360).

Almost surely, 2^505543253 is an apocalyptic number.

It is an amenable number.

505543253 is a deficient number, since it is larger than the sum of its proper divisors (234187).

505543253 is a wasteful number, since it uses less digits than its factorization.

505543253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234186.

The product of its (nonzero) digits is 45000, while the sum is 32.

The square root of 505543253 is about 22484.2890258954. The cubic root of 505543253 is about 796.6228747795.

Adding to 505543253 its reverse (352345505), we get a palindrome (857888758).

The spelling of 505543253 in words is "five hundred five million, five hundred forty-three thousand, two hundred fifty-three".