505512140 has 48 divisors (see below), whose sum is σ = 1218514752. Its totient is φ = 172563456.

The previous prime is 505512127. The next prime is 505512149. The reversal of 505512140 is 41215505.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (505512149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24872 + ... + 40368.

It is an arithmetic number, because the mean of its divisors is an integer number (25385724).

Almost surely, 2^505512140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505512140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (609257376).

505512140 is an abundant number, since it is smaller than the sum of its proper divisors (713002612).

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

505512140 is a wasteful number, since it uses less digits than its factorization.

505512140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15746 (or 15744 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 505512140 is about 22483.5971321317. The cubic root of 505512140 is about 796.6065320724.

Adding to 505512140 its reverse (41215505), we get a palindrome (546727645).

The spelling of 505512140 in words is "five hundred five million, five hundred twelve thousand, one hundred forty".