251153422230340 has 48 divisors (see below), whose sum is σ = 602771648863104. Its totient is φ = 86109253977600.

The previous prime is 251153422230287. The next prime is 251153422230379. The reversal of 251153422230340 is 43032224351152.

It is a super-2 number, since 2×251153422230340² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 251153422230340.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19976860 + ... + 30023020.

It is an arithmetic number, because the mean of its divisors is an integer number (12557742684648).

Almost surely, 2^{251153422230340} is an apocalyptic number.

251153422230340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251153422230340 is an abundant number, since it is smaller than the sum of its proper divisors (351618226632764).

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

251153422230340 is a wasteful number, since it uses less digits than its factorization.

251153422230340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10224748 (or 10224746 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 251153422230340 its reverse (43032224351152), we get a palindrome (294185646581492).

The spelling of 251153422230340 in words is "two hundred fifty-one trillion, one hundred fifty-three billion, four hundred twenty-two million, two hundred thirty thousand, three hundred forty".