255644357 has 2 divisors, whose sum is σ = 255644358. Its totient is φ = 255644356.

The previous prime is 255644341. The next prime is 255644369. The reversal of 255644357 is 753446552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234978241 + 20666116 = 15329^2 + 4546^2 .

It is a cyclic number.

It is not a de Polignac number, because 255644357 - 2⁴ = 255644341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255644377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127822178 + 127822179.

It is an arithmetic number, because the mean of its divisors is an integer number (127822179).

Almost surely, 2^255644357 is an apocalyptic number.

It is an amenable number.

255644357 is a deficient number, since it is larger than the sum of its proper divisors (1).

255644357 is an equidigital number, since it uses as much as digits as its factorization.

255644357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 41.

The square root of 255644357 is about 15988.8822936439. The cubic root of 255644357 is about 634.6662490668. Note that the first 3 decimals are identical.

The spelling of 255644357 in words is "two hundred fifty-five million, six hundred forty-four thousand, three hundred fifty-seven".