255646249 has 4 divisors (see below), whose sum is σ = 255681936. Its totient is φ = 255610564.

The previous prime is 255646241. The next prime is 255646253. The reversal of 255646249 is 942646552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255646249 - 2³ = 255646241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255646241) 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, 2959 + ... + 22804.

It is an arithmetic number, because the mean of its divisors is an integer number (63920484).

Almost surely, 2^255646249 is an apocalyptic number.

It is an amenable number.

255646249 is a deficient number, since it is larger than the sum of its proper divisors (35687).

255646249 is an equidigital number, since it uses as much as digits as its factorization.

255646249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35686.

The product of its digits is 518400, while the sum is 43.

The square root of 255646249 is about 15988.9414596464. The cubic root of 255646249 is about 634.6678147648.

It can be divided in two parts, 25564 and 6249, that added together give a palindrome (31813).

The spelling of 255646249 in words is "two hundred fifty-five million, six hundred forty-six thousand, two hundred forty-nine".