251345425 has 24 divisors (see below), whose sum is σ = 337049856. Its totient is φ = 185207040.

The previous prime is 251345417. The next prime is 251345443. The reversal of 251345425 is 524543152.

It is not a de Polignac number, because 251345425 - 2³ = 251345417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13684 + ... + 26266.

It is an arithmetic number, because the mean of its divisors is an integer number (14043744).

Almost surely, 2^251345425 is an apocalyptic number.

251345425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251345425 is a deficient number, since it is larger than the sum of its proper divisors (85704431).

251345425 is a wasteful number, since it uses less digits than its factorization.

251345425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12657 (or 12652 counting only the distinct ones).

The product of its digits is 24000, while the sum is 31.

The square root of 251345425 is about 15853.8772860143. The cubic root of 251345425 is about 631.0885899110.

Adding to 251345425 its reverse (524543152), we get a palindrome (775888577).

The spelling of 251345425 in words is "two hundred fifty-one million, three hundred forty-five thousand, four hundred twenty-five".