505433213 has 4 divisors (see below), whose sum is σ = 505804320. Its totient is φ = 505062108.

The previous prime is 505433197. The next prime is 505433219. The reversal of 505433213 is 312334505.

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 505433213 - 2⁴ = 505433197 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 (505433219) 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, 183503 + ... + 186236.

It is an arithmetic number, because the mean of its divisors is an integer number (126451080).

Almost surely, 2^505433213 is an apocalyptic number.

It is an amenable number.

505433213 is a deficient number, since it is larger than the sum of its proper divisors (371107).

505433213 is a wasteful number, since it uses less digits than its factorization.

505433213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371106.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 505433213 is about 22481.8418507025. The cubic root of 505433213 is about 796.5650711253.

Adding to 505433213 its reverse (312334505), we get a palindrome (817767718).

The spelling of 505433213 in words is "five hundred five million, four hundred thirty-three thousand, two hundred thirteen".