255231557 has 16 divisors (see below), whose sum is σ = 312584832. Its totient is φ = 203412480.

The previous prime is 255231553. The next prime is 255231569. The reversal of 255231557 is 755132552.

It is a happy number.

255231557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 255231557 - 2² = 255231553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255231553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3044 + ... + 22797.

It is an arithmetic number, because the mean of its divisors is an integer number (19536552).

Almost surely, 2^255231557 is an apocalyptic number.

It is an amenable number.

255231557 is a deficient number, since it is larger than the sum of its proper divisors (57353275).

255231557 is a wasteful number, since it uses less digits than its factorization.

255231557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25948.

The product of its digits is 52500, while the sum is 35.

The square root of 255231557 is about 15975.9681083808. The cubic root of 255231557 is about 634.3244573514.

The spelling of 255231557 in words is "two hundred fifty-five million, two hundred thirty-one thousand, five hundred fifty-seven".