255612420 has 216 divisors, whose sum is σ = 916605144. Its totient is φ = 57480192.

The previous prime is 255612353. The next prime is 255612431. The reversal of 255612420 is 24216552.

255612420 is a `hidden beast` number, since 2 + 5 + 5 + 612 + 42 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 46867716 + 208744704 = 6846^2 + 14448^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 643662 + ... + 644058.

Almost surely, 2^255612420 is an apocalyptic number.

255612420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255612420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458302572).

255612420 is an abundant number, since it is smaller than the sum of its proper divisors (660992724).

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

255612420 is a wasteful number, since it uses less digits than its factorization.

255612420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 255612420 is about 15987.8835372291. The cubic root of 255612420 is about 634.6398188854.

Adding to 255612420 its reverse (24216552), we get a palindrome (279828972).

The spelling of 255612420 in words is "two hundred fifty-five million, six hundred twelve thousand, four hundred twenty".