251424427 has 8 divisors (see below), whose sum is σ = 254270016. Its totient is φ = 248588232.

The previous prime is 251424391. The next prime is 251424443. The reversal of 251424427 is 724424152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 251424427 - 2¹⁵ = 251391659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251424487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60808 + ... + 64810.

It is an arithmetic number, because the mean of its divisors is an integer number (31783752).

Almost surely, 2^251424427 is an apocalyptic number.

251424427 is a deficient number, since it is larger than the sum of its proper divisors (2845589).

251424427 is a wasteful number, since it uses less digits than its factorization.

251424427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4697.

The product of its digits is 17920, while the sum is 31.

The square root of 251424427 is about 15856.3686574196. The cubic root of 251424427 is about 631.1547034916.

Adding to 251424427 its reverse (724424152), we get a palindrome (975848579).

The spelling of 251424427 in words is "two hundred fifty-one million, four hundred twenty-four thousand, four hundred twenty-seven".