251223 has 12 divisors (see below), whose sum is σ = 389880. Its totient is φ = 143472.

The previous prime is 251221. The next prime is 251231. The reversal of 251223 is 322152.

It is not a de Polignac number, because 251223 - 2¹ = 251221 is a prime.

It is a super-2 number, since 2×251223² = 126225991458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 708 + ... + 1001.

It is an arithmetic number, because the mean of its divisors is an integer number (32490).

2²⁵¹²²³ is an apocalyptic number.

251223 is a deficient number, since it is larger than the sum of its proper divisors (138657).

251223 is a wasteful number, since it uses less digits than its factorization.

251223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726 (or 1719 counting only the distinct ones).

The product of its digits is 120, while the sum is 15.

The square root of 251223 is about 501.2215079184. The cubic root of 251223 is about 63.0986110003.

Adding to 251223 its reverse (322152), we get a palindrome (573375).

It can be divided in two parts, 251 and 223, that added together give a palindrome (474).

The spelling of 251223 in words is "two hundred fifty-one thousand, two hundred twenty-three".