255813751 has 8 divisors (see below), whose sum is σ = 273144960. Its totient is φ = 238999992.

The previous prime is 255813737. The next prime is 255813757. The reversal of 255813751 is 157318552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-255813751 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255813751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255813757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128341 + ... + 130318.

It is an arithmetic number, because the mean of its divisors is an integer number (34143120).

Almost surely, 2^255813751 is an apocalyptic number.

255813751 is a deficient number, since it is larger than the sum of its proper divisors (17331209).

255813751 is a wasteful number, since it uses less digits than its factorization.

255813751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258725.

The product of its digits is 42000, while the sum is 37.

The square root of 255813751 is about 15994.1786597499. The cubic root of 255813751 is about 634.8063980859.

The spelling of 255813751 in words is "two hundred fifty-five million, eight hundred thirteen thousand, seven hundred fifty-one".