255399071 has 4 divisors (see below), whose sum is σ = 255953544. Its totient is φ = 254844600.

The previous prime is 255399019. The next prime is 255399073. The reversal of 255399071 is 170993552.

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-255399071 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 (255399073) 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, 276545 + ... + 277466.

It is an arithmetic number, because the mean of its divisors is an integer number (63988386).

Almost surely, 2^255399071 is an apocalyptic number.

255399071 is a deficient number, since it is larger than the sum of its proper divisors (554473).

255399071 is an equidigital number, since it uses as much as digits as its factorization.

255399071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554472.

The product of its (nonzero) digits is 85050, while the sum is 41.

The square root of 255399071 is about 15981.2099354210. The cubic root of 255399071 is about 634.4632006300.

The spelling of 255399071 in words is "two hundred fifty-five million, three hundred ninety-nine thousand, seventy-one".