255825791 has 24 divisors (see below), whose sum is σ = 292582080. Its totient is φ = 222094656.

The previous prime is 255825769. The next prime is 255825793. The reversal of 255825791 is 197528552.

It is not a de Polignac number, because 255825791 - 2¹⁸ = 255563647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255825793) 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, 696890 + ... + 697256.

It is an arithmetic number, because the mean of its divisors is an integer number (12190920).

Almost surely, 2^255825791 is an apocalyptic number.

255825791 is a deficient number, since it is larger than the sum of its proper divisors (36756289).

255825791 is a wasteful number, since it uses less digits than its factorization.

255825791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 452 counting only the distinct ones).

The product of its digits is 252000, while the sum is 44.

The square root of 255825791 is about 15994.5550422636. Note that the first 3 decimals coincide. The cubic root of 255825791 is about 634.8163570881.

The spelling of 255825791 in words is "two hundred fifty-five million, eight hundred twenty-five thousand, seven hundred ninety-one".