508522221 has 24 divisors (see below), whose sum is σ = 778410360. Its totient is φ = 319334400.

The previous prime is 508522211. The next prime is 508522243. The reversal of 508522221 is 122225805.

It can be written as a sum of positive squares in 4 ways, for example, as 59675625 + 448846596 = 7725^2 + 21186^2 .

It is not a de Polignac number, because 508522221 - 2¹⁹ = 507997933 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (508522211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13060 + ... + 34461.

It is an arithmetic number, because the mean of its divisors is an integer number (32433765).

Almost surely, 2^508522221 is an apocalyptic number.

It is an amenable number.

508522221 is a deficient number, since it is larger than the sum of its proper divisors (269888139).

508522221 is a wasteful number, since it uses less digits than its factorization.

508522221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47597 (or 47594 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 508522221 is about 22550.4372684877. The cubic root of 508522221 is about 798.1845400186.

It can be divided in two parts, 508 and 522221, that added together give a square (522729 = 723²).

The spelling of 508522221 in words is "five hundred eight million, five hundred twenty-two thousand, two hundred twenty-one".