505021212 has 36 divisors (see below), whose sum is σ = 1332087120. Its totient is φ = 161020992.

The previous prime is 505021207. The next prime is 505021247. The reversal of 505021212 is 212120505.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 304137 + ... + 305792.

It is an arithmetic number, because the mean of its divisors is an integer number (37002420).

Almost surely, 2^505021212 is an apocalyptic number.

It is an amenable number.

505021212 is an abundant number, since it is smaller than the sum of its proper divisors (827065908).

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

505021212 is a wasteful number, since it uses less digits than its factorization.

505021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609962 (or 609957 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 505021212 is about 22472.6770100938. The cubic root of 505021212 is about 796.3485737980.

Adding to 505021212 its reverse (212120505), we get a palindrome (717141717).

It can be divided in two parts, 5050 and 21212, that added together give a palindrome (26262).

The spelling of 505021212 in words is "five hundred five million, twenty-one thousand, two hundred twelve".