505246321 has 4 divisors (see below), whose sum is σ = 517569444. Its totient is φ = 492923200.

The previous prime is 505246249. The next prime is 505246337. The reversal of 505246321 is 123642505.

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 293951025 + 211295296 = 17145^2 + 14536^2 .

It is a cyclic number.

It is not a de Polignac number, because 505246321 - 2¹⁷ = 505115249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505246321.

It is not an unprimeable number, because it can be changed into a prime (505246351) 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, 6161500 + ... + 6161581.

It is an arithmetic number, because the mean of its divisors is an integer number (129392361).

Almost surely, 2^505246321 is an apocalyptic number.

It is an amenable number.

505246321 is a deficient number, since it is larger than the sum of its proper divisors (12323123).

505246321 is a wasteful number, since it uses less digits than its factorization.

505246321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12323122.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 505246321 is about 22477.6849564184. The cubic root of 505246321 is about 796.4668781373.

Adding to 505246321 its reverse (123642505), we get a palindrome (628888826).

The spelling of 505246321 in words is "five hundred five million, two hundred forty-six thousand, three hundred twenty-one".