255643147 has 4 divisors (see below), whose sum is σ = 255757216. Its totient is φ = 255529080.

The previous prime is 255643139. The next prime is 255643181. The reversal of 255643147 is 741346552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255643147 - 2³ = 255643139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255643187) 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, 53604 + ... + 58177.

It is an arithmetic number, because the mean of its divisors is an integer number (63939304).

Almost surely, 2^255643147 is an apocalyptic number.

255643147 is a deficient number, since it is larger than the sum of its proper divisors (114069).

255643147 is a wasteful number, since it uses less digits than its factorization.

255643147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114068.

The product of its digits is 100800, while the sum is 37.

The square root of 255643147 is about 15988.8444548066. The cubic root of 255643147 is about 634.6652477442.

Adding to 255643147 its reverse (741346552), we get a palindrome (996989699).

The spelling of 255643147 in words is "two hundred fifty-five million, six hundred forty-three thousand, one hundred forty-seven".