255450491 has 4 divisors (see below), whose sum is σ = 256747392. Its totient is φ = 254153592.

The previous prime is 255450463. The next prime is 255450521. The reversal of 255450491 is 194054552.

It is a happy number.

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 255450491 - 2⁶ = 255450427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255450691) 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, 648155 + ... + 648548.

It is an arithmetic number, because the mean of its divisors is an integer number (64186848).

Almost surely, 2^255450491 is an apocalyptic number.

255450491 is a deficient number, since it is larger than the sum of its proper divisors (1296901).

255450491 is a wasteful number, since it uses less digits than its factorization.

255450491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296900.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 255450491 is about 15982.8186187543. The cubic root of 255450491 is about 634.5057770164.

The spelling of 255450491 in words is "two hundred fifty-five million, four hundred fifty thousand, four hundred ninety-one".