505001100 has 72 divisors (see below), whose sum is σ = 1496810448. Its totient is φ = 131379200.

The previous prime is 505001093. The next prime is 505001113. The reversal of 505001100 is 1100505.

It is a super-2 number, since 2×505001100² = 510052222002420000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8229 + ... + 32828.

It is an arithmetic number, because the mean of its divisors is an integer number (20789034).

Almost surely, 2^505001100 is an apocalyptic number.

505001100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

505001100 is an abundant number, since it is smaller than the sum of its proper divisors (991809348).

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

505001100 is a wasteful number, since it uses less digits than its factorization.

505001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41115 (or 41108 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 12.

The square root of 505001100 is about 22472.2295289097. The cubic root of 505001100 is about 796.3380023773.

Adding to 505001100 its reverse (1100505), we get a palindrome (506101605).

The spelling of 505001100 in words is "five hundred five million, one thousand, one hundred".