505211212 has 24 divisors (see below), whose sum is σ = 965662992. Its totient is φ = 229363200.

The previous prime is 505211167. The next prime is 505211243. The reversal of 505211212 is 212112505.

It is a self number, because there is not a number n which added to its sum of digits gives 505211212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32248 + ... + 45280.

It is an arithmetic number, because the mean of its divisors is an integer number (40235958).

Almost surely, 2^505211212 is an apocalyptic number.

It is an amenable number.

505211212 is a deficient number, since it is larger than the sum of its proper divisors (460451780).

505211212 is a wasteful number, since it uses less digits than its factorization.

505211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13929 (or 13927 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 505211212 is about 22476.9039682960. The cubic root of 505211212 is about 796.4484291800.

Adding to 505211212 its reverse (212112505), we get a palindrome (717323717).

The spelling of 505211212 in words is "five hundred five million, two hundred eleven thousand, two hundred twelve".