255557647 has 2 divisors, whose sum is σ = 255557648. Its totient is φ = 255557646.

The previous prime is 255557639. The next prime is 255557663. The reversal of 255557647 is 746755552.

255557647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255557647 - 2³ = 255557639 is a prime.

It is a super-4 number, since 4×255557647⁴ (a number of 35 digits) contains 4444 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 255557597 and 255557606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255557677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127778823 + 127778824.

It is an arithmetic number, because the mean of its divisors is an integer number (127778824).

Almost surely, 2^255557647 is an apocalyptic number.

255557647 is a deficient number, since it is larger than the sum of its proper divisors (1).

255557647 is an equidigital number, since it uses as much as digits as its factorization.

255557647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1470000, while the sum is 46.

The square root of 255557647 is about 15986.1704920222. The cubic root of 255557647 is about 634.5944851337.

The spelling of 255557647 in words is "two hundred fifty-five million, five hundred fifty-seven thousand, six hundred forty-seven".