251422 has 4 divisors (see below), whose sum is σ = 377136. Its totient is φ = 125710.

The previous prime is 251417. The next prime is 251429. The reversal of 251422 is 224152.

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

It is a super-3 number, since 3×251422³ = 47679433315210344, which contains 333 as substring.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 251396 and 251405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251429) 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 as a sum of consecutive naturals, namely, 62854 + ... + 62857.

It is an arithmetic number, because the mean of its divisors is an integer number (94284).

2²⁵¹⁴²² is an apocalyptic number.

251422 is a deficient number, since it is larger than the sum of its proper divisors (125714).

251422 is a wasteful number, since it uses less digits than its factorization.

251422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125713.

The product of its digits is 160, while the sum is 16.

The square root of 251422 is about 501.4199836464. The cubic root of 251422 is about 63.1152672640.

Adding to 251422 its reverse (224152), we get a palindrome (475574).

The spelling of 251422 in words is "two hundred fifty-one thousand, four hundred twenty-two".