251422424 has 16 divisors (see below), whose sum is σ = 514273320. Its totient is φ = 114282880.

The previous prime is 251422403. The next prime is 251422441. The reversal of 251422424 is 424224152.

It is a junction number, because it is equal to n+sod(n) for n = 251422393 and 251422402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428449 + ... + 1428624.

Almost surely, 2^251422424 is an apocalyptic number.

It is an amenable number.

251422424 is an abundant number, since it is smaller than the sum of its proper divisors (262850896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251422424 is a wasteful number, since it uses less digits than its factorization.

251422424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857090 (or 2857086 counting only the distinct ones).

The product of its digits is 5120, while the sum is 26.

The square root of 251422424 is about 15856.3054965525. The cubic root of 251422424 is about 631.1530274330.

Adding to 251422424 its reverse (424224152), we get a palindrome (675646576).

The spelling of 251422424 in words is "two hundred fifty-one million, four hundred twenty-two thousand, four hundred twenty-four".