255221512 has 128 divisors (see below), whose sum is σ = 624476160. Its totient is φ = 95074560.

The previous prime is 255221507. The next prime is 255221531. The reversal of 255221512 is 215122552.

It is a super-2 number, since 2×255221512² = 130276040375132288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 970293 + ... + 970555.

It is an arithmetic number, because the mean of its divisors is an integer number (4878720).

Almost surely, 2^255221512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255221512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312238080).

255221512 is an abundant number, since it is smaller than the sum of its proper divisors (369254648).

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

255221512 is a wasteful number, since it uses less digits than its factorization.

255221512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 359 counting only the distinct ones).

The product of its digits is 2000, while the sum is 25.

The square root of 255221512 is about 15975.6537268432. The cubic root of 255221512 is about 634.3161356626.

The spelling of 255221512 in words is "two hundred fifty-five million, two hundred twenty-one thousand, five hundred twelve".