2258 has 4 divisors (see below), whose sum is σ = 3390.
Its totient is φ = 1128.
The previous prime is 2251. The next prime is 2267. The reversal of 2258 is 8522.
2258 = 34 + 44 + ... + 64.
It is a happy number.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8522 = 2 ⋅4261.
It can be written as a sum of positive squares in only one way, i.e., 2209 + 49 = 47^2 + 7^2
It is a Curzon number.
It is a plaindrome in base 10.
It is a nialpdrome in base 8 and base 14.
It is not an unprimeable number, because it can be changed into a prime (2251) by changing a digit.
2258 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 563 + ... + 566.
2258 is a deficient number, since it is larger than the sum of its proper divisors (1132).
2258 is a wasteful number, since it uses less digits than its factorization.
2258 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1131.
The product of its digits is 160, while the sum is 17.
The square root of 2258 is about 47.5184174821.
The cubic root of 2258 is about 13.1192189204.
The spelling of 2258 in words is "two thousand, two hundred fifty-eight".