251424425 has 12 divisors (see below), whose sum is σ = 356304576. Its totient is φ = 172405200.

The previous prime is 251424391. The next prime is 251424443. The reversal of 251424425 is 524424152.

It is not a de Polignac number, because 251424425 - 2¹² = 251420329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 718181 + ... + 718530.

It is an arithmetic number, because the mean of its divisors is an integer number (29692048).

Almost surely, 2^251424425 is an apocalyptic number.

251424425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251424425 is a deficient number, since it is larger than the sum of its proper divisors (104880151).

251424425 is a wasteful number, since it uses less digits than its factorization.

251424425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436728 (or 1436723 counting only the distinct ones).

The product of its digits is 12800, while the sum is 29.

The square root of 251424425 is about 15856.3685943535. The cubic root of 251424425 is about 631.1547018181.

Adding to 251424425 its reverse (524424152), we get a palindrome (775848577).

The spelling of 251424425 in words is "two hundred fifty-one million, four hundred twenty-four thousand, four hundred twenty-five".