255685783 has 4 divisors (see below), whose sum is σ = 261632008. Its totient is φ = 249739560.

The previous prime is 255685757. The next prime is 255685789. The reversal of 255685783 is 387586552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255685783 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 (255685789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2973048 + ... + 2973133.

It is an arithmetic number, because the mean of its divisors is an integer number (65408002).

Almost surely, 2^255685783 is an apocalyptic number.

255685783 is a deficient number, since it is larger than the sum of its proper divisors (5946225).

255685783 is an equidigital number, since it uses as much as digits as its factorization.

255685783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5946224.

The product of its digits is 2016000, while the sum is 49.

The square root of 255685783 is about 15990.1777038281. The cubic root of 255685783 is about 634.7005288038.

The spelling of 255685783 in words is "two hundred fifty-five million, six hundred eighty-five thousand, seven hundred eighty-three".