251283 has 4 divisors (see below), whose sum is σ = 335048. Its totient is φ = 167520.

The previous prime is 251263. The next prime is 251287. The reversal of 251283 is 382152.

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

It is not a de Polignac number, because 251283 - 2⁶ = 251219 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41878 + ... + 41883.

It is an arithmetic number, because the mean of its divisors is an integer number (83762).

2²⁵¹²⁸³ is an apocalyptic number.

251283 is a deficient number, since it is larger than the sum of its proper divisors (83765).

251283 is an equidigital number, since it uses as much as digits as its factorization.

251283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83764.

The product of its digits is 480, while the sum is 21.

The square root of 251283 is about 501.2813581214. The cubic root of 251283 is about 63.1036339153.

The spelling of 251283 in words is "two hundred fifty-one thousand, two hundred eighty-three".