255502221 has 32 divisors (see below), whose sum is σ = 375392640. Its totient is φ = 153619200.

The previous prime is 255502211. The next prime is 255502249. The reversal of 255502221 is 122205552.

It is not a de Polignac number, because 255502221 - 2⁵ = 255502189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255502191 and 255502200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255502211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 501715 + ... + 502223.

It is an arithmetic number, because the mean of its divisors is an integer number (11731020).

Almost surely, 2^255502221 is an apocalyptic number.

It is an amenable number.

255502221 is a deficient number, since it is larger than the sum of its proper divisors (119890419).

255502221 is a wasteful number, since it uses less digits than its factorization.

255502221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 255502221 is about 15984.4368371238. The cubic root of 255502221 is about 634.5486043217.

Adding to 255502221 its reverse (122205552), we get a palindrome (377707773).

The spelling of 255502221 in words is "two hundred fifty-five million, five hundred two thousand, two hundred twenty-one".