251568422472 has 64 divisors (see below), whose sum is σ = 664938835200.
Its totient is φ = 79092659520.
The previous prime is 251568422471. The next prime is 251568422509. The reversal of 251568422472 is 274224865152.
251568422472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is not an unprimeable number, because it can be changed into a prime (251568422471) by changing a digit.
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, 1111654 + ... + 1318677.
It is an arithmetic number, because the mean of its divisors is an integer number (10389669300).
Almost surely, 2251568422472 is an apocalyptic number.
It is an amenable number.
251568422472 is an abundant number, since it is smaller than the sum of its proper divisors (413370412728).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
251568422472 is a wasteful number, since it uses less digits than its factorization.
251568422472 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2430586 (or 2430582 counting only the distinct ones).
The product of its digits is 2150400, while the sum is 48.
The spelling of 251568422472 in words is "two hundred fifty-one billion, five hundred sixty-eight million, four hundred twenty-two thousand, four hundred seventy-two".