505500231 has 16 divisors (see below), whose sum is σ = 680688000. Its totient is φ = 333671328.

The previous prime is 505500211. The next prime is 505500241. The reversal of 505500231 is 132005505.

It is not a de Polignac number, because 505500231 - 2⁷ = 505500103 is a prime.

It is a super-2 number, since 2×505500231² = 511060967082106722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 505500198 and 505500207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505500211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153480 + ... + 156738.

It is an arithmetic number, because the mean of its divisors is an integer number (42543000).

Almost surely, 2^505500231 is an apocalyptic number.

505500231 is a deficient number, since it is larger than the sum of its proper divisors (175187769).

505500231 is a wasteful number, since it uses less digits than its factorization.

505500231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 505500231 is about 22483.3322930566. The cubic root of 505500231 is about 796.6002764615.

Adding to 505500231 its reverse (132005505), we get a palindrome (637505736).

The spelling of 505500231 in words is "five hundred five million, five hundred thousand, two hundred thirty-one".