505321345 has 32 divisors (see below), whose sum is σ = 658409472. Its totient is φ = 370885632.

The previous prime is 505321343. The next prime is 505321357. The reversal of 505321345 is 543123505.

It is a cyclic number.

It is not a de Polignac number, because 505321345 - 2¹ = 505321343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505321343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1004364 + ... + 1004866.

It is an arithmetic number, because the mean of its divisors is an integer number (20575296).

Almost surely, 2^505321345 is an apocalyptic number.

It is an amenable number.

505321345 is a deficient number, since it is larger than the sum of its proper divisors (153088127).

505321345 is a wasteful number, since it uses less digits than its factorization.

505321345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 505321345 is about 22479.3537496077. The cubic root of 505321345 is about 796.5062986280.

The spelling of 505321345 in words is "five hundred five million, three hundred twenty-one thousand, three hundred forty-five".