Search a number
-
+
258031 is a prime number
BaseRepresentation
bin111110111111101111
3111002221201
4332333233
531224111
65310331
72123164
oct767757
9432851
10258031
11166954
121053a7
13905a7
146a06b
15516c1
hex3efef

258031 has 2 divisors, whose sum is σ = 258032. Its totient is φ = 258030.

The previous prime is 258023. The next prime is 258061. The reversal of 258031 is 130852.

It is a happy number.

258031 is nontrivially palindromic in base 4.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 258031 - 23 = 258023 is a prime.

It is a super-2 number, since 2×2580312 = 133159993922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129015 + 129016.

It is an arithmetic number, because the mean of its divisors is an integer number (129016).

2258031 is an apocalyptic number.

258031 is a deficient number, since it is larger than the sum of its proper divisors (1).

258031 is an equidigital number, since it uses as much as digits as its factorization.

258031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 258031 is about 507.9675186466. The cubic root of 258031 is about 63.6635172307.

Adding to 258031 its reverse (130852), we get a palindrome (388883).

The spelling of 258031 in words is "two hundred fifty-eight thousand, thirty-one".