251380425 has 24 divisors (see below), whose sum is σ = 416079520. Its totient is φ = 133920000.

The previous prime is 251380417. The next prime is 251380427. The reversal of 251380425 is 524083152.

It is not a de Polignac number, because 251380425 - 2³ = 251380417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 251380392 and 251380401.

It is not an unprimeable number, because it can be changed into a prime (251380427) 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 23 ways as a sum of consecutive naturals, for example, 110550 + ... + 112800.

Almost surely, 2^251380425 is an apocalyptic number.

251380425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251380425 is a deficient number, since it is larger than the sum of its proper divisors (164699095).

251380425 is a wasteful number, since it uses less digits than its factorization.

251380425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753 (or 3748 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 251380425 is about 15854.9810785128. The cubic root of 251380425 is about 631.1178817053.

The spelling of 251380425 in words is "two hundred fifty-one million, three hundred eighty thousand, four hundred twenty-five".