251425200000 has 768 divisors, whose sum is σ = 915646394880. Its totient is φ = 60748800000.

The previous prime is 251425199969. The next prime is 251425200011. The reversal of 251425200000 is 2524152.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 251425200000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1107599887 + ... + 1107600113.

It is an arithmetic number, because the mean of its divisors is an integer number (1192247910).

Almost surely, 2^251425200000 is an apocalyptic number.

251425200000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251425200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457823197440).

251425200000 is an abundant number, since it is smaller than the sum of its proper divisors (664221194880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251425200000 is an equidigital number, since it uses as much as digits as its factorization.

251425200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 251425200000 its reverse (2524152), we get a palindrome (251427724152).

The spelling of 251425200000 in words is "two hundred fifty-one billion, four hundred twenty-five million, two hundred thousand".