255321825 has 24 divisors (see below), whose sum is σ = 460509216. Its totient is φ = 123792000.

The previous prime is 255321821. The next prime is 255321863. The reversal of 255321825 is 528123552.

It is not a de Polignac number, because 255321825 - 2² = 255321821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (255321821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153916 + ... + 155565.

It is an arithmetic number, because the mean of its divisors is an integer number (19187884).

Almost surely, 2^255321825 is an apocalyptic number.

255321825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

255321825 is a deficient number, since it is larger than the sum of its proper divisors (205187391).

255321825 is a wasteful number, since it uses less digits than its factorization.

255321825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309505 (or 309500 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

The square root of 255321825 is about 15978.7929769429. The cubic root of 255321825 is about 634.3992292589.

The spelling of 255321825 in words is "two hundred fifty-five million, three hundred twenty-one thousand, eight hundred twenty-five".