502212221 has 6 divisors (see below), whose sum is σ = 584206110. Its totient is φ = 430467576.

The previous prime is 502212209. The next prime is 502212223. The reversal of 502212221 is 122212205.

It can be written as a sum of positive squares in only one way, i.e., 455822500 + 46389721 = 21350^2 + 6811^2 .

It is not a de Polignac number, because 502212221 - 2¹⁸ = 501950077 is a prime.

It is a super-2 number, since 2×502212221² = 504434229843505682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 502212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (502212223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5124566 + ... + 5124663.

It is an arithmetic number, because the mean of its divisors is an integer number (97367685).

Almost surely, 2^502212221 is an apocalyptic number.

It is an amenable number.

502212221 is a deficient number, since it is larger than the sum of its proper divisors (81993889).

502212221 is a wasteful number, since it uses less digits than its factorization.

502212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10249243 (or 10249236 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 502212221 is about 22410.0919453714. The cubic root of 502212221 is about 794.8693645034.

Adding to 502212221 its reverse (122212205), we get a palindrome (624424426).

The spelling of 502212221 in words is "five hundred two million, two hundred twelve thousand, two hundred twenty-one".