251343 has 20 divisors (see below), whose sum is σ = 392040. Its totient is φ = 160272.

The previous prime is 251323. The next prime is 251347. The reversal of 251343 is 343152.

251343 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 251343 - 2⁸ = 251087 is a prime.

251343 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2296 + ... + 2402.

It is an arithmetic number, because the mean of its divisors is an integer number (19602).

2²⁵¹³⁴³ is an apocalyptic number.

251343 is a deficient number, since it is larger than the sum of its proper divisors (140697).

251343 is a wasteful number, since it uses less digits than its factorization.

251343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 139 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 251343 is about 501.3412011794. The cubic root of 251343 is about 63.1086560307.

Adding to 251343 its reverse (343152), we get a palindrome (594495).

Subtracting 251343 from its reverse (343152), we obtain a square (91809 = 303²).

It can be divided in two parts, 2513 and 43, that added together give a triangular number (2556 = T₇₁).

The spelling of 251343 in words is "two hundred fifty-one thousand, three hundred forty-three".