505221353 has 32 divisors (see below), whose sum is σ = 650280960. Its totient is φ = 381775680.

The previous prime is 505221349. The next prime is 505221361. The reversal of 505221353 is 353122505.

It is not a de Polignac number, because 505221353 - 2² = 505221349 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505221313) 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, 221726 + ... + 223992.

It is an arithmetic number, because the mean of its divisors is an integer number (20321280).

Almost surely, 2^505221353 is an apocalyptic number.

It is an amenable number.

505221353 is a deficient number, since it is larger than the sum of its proper divisors (145059607).

505221353 is a wasteful number, since it uses less digits than its factorization.

505221353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 505221353 is about 22477.1295542825. The cubic root of 505221353 is about 796.4537581258.

Adding to 505221353 its reverse (353122505), we get a palindrome (858343858).

The spelling of 505221353 in words is "five hundred five million, two hundred twenty-one thousand, three hundred fifty-three".