255217800 has 48 divisors (see below), whose sum is σ = 791177040. Its totient is φ = 68057920.

The previous prime is 255217769. The next prime is 255217801. The reversal of 255217800 is 8712552.

It is a super-2 number, since 2×255217800² = 130272250873680000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (255217801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212082 + ... + 213281.

It is an arithmetic number, because the mean of its divisors is an integer number (16482855).

Almost surely, 2^255217800 is an apocalyptic number.

255217800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255217800 is an abundant number, since it is smaller than the sum of its proper divisors (535959240).

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

255217800 is a wasteful number, since it uses less digits than its factorization.

255217800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425382 (or 425373 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 255217800 is about 15975.5375496413. The cubic root of 255217800 is about 634.3130604347.

The spelling of 255217800 in words is "two hundred fifty-five million, two hundred seventeen thousand, eight hundred".