255934861 has 32 divisors (see below), whose sum is σ = 325221120. Its totient is φ = 196038144.

The previous prime is 255934849. The next prime is 255934891. The reversal of 255934861 is 168439552.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255934861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255934801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391611 + ... + 392263.

It is an arithmetic number, because the mean of its divisors is an integer number (10163160).

Almost surely, 2^255934861 is an apocalyptic number.

It is an amenable number.

255934861 is a deficient number, since it is larger than the sum of its proper divisors (69286259).

255934861 is a wasteful number, since it uses less digits than its factorization.

255934861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its digits is 259200, while the sum is 43.

The square root of 255934861 is about 15997.9642767447. The cubic root of 255934861 is about 634.9065611578.

The spelling of 255934861 in words is "two hundred fifty-five million, nine hundred thirty-four thousand, eight hundred sixty-one".