255404551 has 8 divisors (see below), whose sum is σ = 259051520. Its totient is φ = 251768088.

The previous prime is 255404531. The next prime is 255404573. The reversal of 255404551 is 155404552.

255404551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255404551 - 2⁷ = 255404423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255404531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55210 + ... + 59656.

It is an arithmetic number, because the mean of its divisors is an integer number (32381440).

Almost surely, 2^255404551 is an apocalyptic number.

255404551 is a deficient number, since it is larger than the sum of its proper divisors (3646969).

255404551 is an equidigital number, since it uses as much as digits as its factorization.

255404551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5253.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 255404551 is about 15981.3813858502. The cubic root of 255404551 is about 634.4677384088.

Subtracting from 255404551 its reverse (155404552), we obtain a palindrome (99999999).

The spelling of 255404551 in words is "two hundred fifty-five million, four hundred four thousand, five hundred fifty-one".