505511000 has 32 divisors (see below), whose sum is σ = 1182898080. Its totient is φ = 202204000.

The previous prime is 505510961. The next prime is 505511003. The reversal of 505511000 is 115505.

It is a super-2 number, since 2×505511000² = 511082742242000000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 505511000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505511003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251756 + ... + 253755.

It is an arithmetic number, because the mean of its divisors is an integer number (36965565).

Almost surely, 2^505511000 is an apocalyptic number.

505511000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

505511000 is an abundant number, since it is smaller than the sum of its proper divisors (677387080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505511000 is a wasteful number, since it uses less digits than its factorization.

505511000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505532 (or 505518 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 505511000 is about 22483.5717803022. The cubic root of 505511000 is about 796.6059332525.

Adding to 505511000 its reverse (115505), we get a palindrome (505626505).

The spelling of 505511000 in words is "five hundred five million, five hundred eleven thousand".