251093 has 4 divisors (see below), whose sum is σ = 252588. Its totient is φ = 249600.

The previous prime is 251087. The next prime is 251099. The reversal of 251093 is 390152.

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

It is an interprime number because it is at equal distance from previous prime (251087) and next prime (251099).

It can be written as a sum of positive squares in 2 ways, for example, as 18769 + 232324 = 137^2 + 482^2 .

It is a cyclic number.

It is not a de Polignac number, because 251093 - 2⁸ = 250837 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 (251099) 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, 458 + ... + 843.

It is an arithmetic number, because the mean of its divisors is an integer number (63147).

2²⁵¹⁰⁹³ is an apocalyptic number.

It is an amenable number.

251093 is a deficient number, since it is larger than the sum of its proper divisors (1495).

251093 is a wasteful number, since it uses less digits than its factorization.

251093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 251093 is about 501.0918079554. The cubic root of 251093 is about 63.0877252736.

The spelling of 251093 in words is "two hundred fifty-one thousand, ninety-three".