251145211425 has 24 divisors (see below), whose sum is σ = 415313299200. Its totient is φ = 133916193600.

The previous prime is 251145211417. The next prime is 251145211451. The reversal of 251145211425 is 524112541152.

It is not a de Polignac number, because 251145211425 - 2³ = 251145211417 is a prime.

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, 15751 + ... + 708899.

It is an arithmetic number, because the mean of its divisors is an integer number (17304720800).

Almost surely, 2^251145211425 is an apocalyptic number.

251145211425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251145211425 is a deficient number, since it is larger than the sum of its proper divisors (164168087775).

251145211425 is a wasteful number, since it uses less digits than its factorization.

251145211425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697993 (or 697988 counting only the distinct ones).

The product of its digits is 16000, while the sum is 33.

Adding to 251145211425 its reverse (524112541152), we get a palindrome (775257752577).

The spelling of 251145211425 in words is "two hundred fifty-one billion, one hundred forty-five million, two hundred eleven thousand, four hundred twenty-five".