255311615 has 16 divisors (see below), whose sum is σ = 344288448. Its totient is φ = 180339456.

The previous prime is 255311611. The next prime is 255311659. The reversal of 255311615 is 516113552.

It is a cyclic number.

It is not a de Polignac number, because 255311615 - 2² = 255311611 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 (255311611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83894 + ... + 86883.

It is an arithmetic number, because the mean of its divisors is an integer number (21518028).

Almost surely, 2^255311615 is an apocalyptic number.

255311615 is a deficient number, since it is larger than the sum of its proper divisors (88976833).

255311615 is a wasteful number, since it uses less digits than its factorization.

255311615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170818.

The product of its digits is 4500, while the sum is 29.

The square root of 255311615 is about 15978.4734877898. The cubic root of 255311615 is about 634.3907728693.

The spelling of 255311615 in words is "two hundred fifty-five million, three hundred eleven thousand, six hundred fifteen".