255503420 has 24 divisors (see below), whose sum is σ = 549037104. Its totient is φ = 99824256.

The previous prime is 255503399. The next prime is 255503447. The reversal of 255503420 is 24305552.

It is a self number, because there is not a number n which added to its sum of digits gives 255503420.

It is a congruent number.

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, 147689 + ... + 149408.

It is an arithmetic number, because the mean of its divisors is an integer number (22876546).

Almost surely, 2^255503420 is an apocalyptic number.

255503420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255503420 is an abundant number, since it is smaller than the sum of its proper divisors (293533684).

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

255503420 is a wasteful number, since it uses less digits than its factorization.

255503420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297149 (or 297147 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 255503420 is about 15984.4743423110. The cubic root of 255503420 is about 634.5495969062.

Adding to 255503420 its reverse (24305552), we get a palindrome (279808972).

The spelling of 255503420 in words is "two hundred fifty-five million, five hundred three thousand, four hundred twenty".