251230424 has 16 divisors (see below), whose sum is σ = 482012520. Its totient is φ = 122693760.

The previous prime is 251230423. The next prime is 251230489. The reversal of 251230424 is 424032152.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 251230424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251230423) by changing a digit.

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, 364817 + ... + 365504.

Almost surely, 2^251230424 is an apocalyptic number.

It is an amenable number.

251230424 is a deficient number, since it is larger than the sum of its proper divisors (230782096).

251230424 is a wasteful number, since it uses less digits than its factorization.

251230424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730370 (or 730366 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 251230424 is about 15850.2499664832. The cubic root of 251230424 is about 630.9923254567.

Adding to 251230424 its reverse (424032152), we get a palindrome (675262576).

The spelling of 251230424 in words is "two hundred fifty-one million, two hundred thirty thousand, four hundred twenty-four".