Search a number
251493 = 3117621
BaseRepresentation
bin111101011001100101
3110202222120
4331121211
531021433
65220153
72065134
oct753145
9422876
10251493
11161a50
12101659
138a618
146791b
154e7b3
hex3d665

251493 has 8 divisors (see below), whose sum is σ = 365856. Its totient is φ = 152400.

The previous prime is 251491. The next prime is 251501. The reversal of 251493 is 394152.

251493 is digitally balanced in base 7, 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 not a de Polignac number, because 251493 - 21 = 251491 is a prime.

251493 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 (251491) 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 7 ways as a sum of consecutive naturals, for example, 3778 + ... + 3843.

It is an arithmetic number, because the mean of its divisors is an integer number (45732).

2251493 is an apocalyptic number.

It is an amenable number.

251493 is a deficient number, since it is larger than the sum of its proper divisors (114363).

251493 is a wasteful number, since it uses less digits than its factorization.

251493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7635.

The product of its digits is 1080, while the sum is 24.

The square root of 251493 is about 501.4907775822. The cubic root of 251493 is about 63.1212078237.

It can be divided in two parts, 25149 and 3, that added together give a palindrome (25152).

The spelling of 251493 in words is "two hundred fifty-one thousand, four hundred ninety-three".

Divisors: 1 3 11 33 7621 22863 83831 251493