251425214120440 has 32 divisors (see below), whose sum is σ = 565711086631680. Its totient is φ = 100569311450752.

The previous prime is 251425214120419. The next prime is 251425214120447. The reversal of 251425214120440 is 44021412524152.

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 251425214120440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251425214120447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18918424 + ... + 29338663.

It is an arithmetic number, because the mean of its divisors is an integer number (17678471457240).

Almost surely, 2^{251425214120440} is an apocalyptic number.

251425214120440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251425214120440 is an abundant number, since it is smaller than the sum of its proper divisors (314285872511240).

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

251425214120440 is a wasteful number, since it uses less digits than its factorization.

251425214120440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48387351 (or 48387347 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 37.

Adding to 251425214120440 its reverse (44021412524152), we get a palindrome (295446626644592).

The spelling of 251425214120440 in words is "two hundred fifty-one trillion, four hundred twenty-five billion, two hundred fourteen million, one hundred twenty thousand, four hundred forty".