255691238 has 16 divisors (see below), whose sum is σ = 429713424. Its totient is φ = 113081760.

The previous prime is 255691223. The next prime is 255691273. The reversal of 255691238 is 832196552.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 255691195 and 255691204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156245 + ... + 157872.

It is an arithmetic number, because the mean of its divisors is an integer number (26857089).

Almost surely, 2^255691238 is an apocalyptic number.

255691238 is a deficient number, since it is larger than the sum of its proper divisors (174022186).

255691238 is a wasteful number, since it uses less digits than its factorization.

255691238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314167.

The product of its digits is 129600, while the sum is 41.

The square root of 255691238 is about 15990.3482763822. The cubic root of 255691238 is about 634.7050425038.

The spelling of 255691238 in words is "two hundred fifty-five million, six hundred ninety-one thousand, two hundred thirty-eight".