252505312140 has 24 divisors (see below), whose sum is σ = 707014874160. Its totient is φ = 67334749888.

The previous prime is 252505312121. The next prime is 252505312153. The reversal of 252505312140 is 41213505252.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 252505312098 and 252505312107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2104210875 + ... + 2104210994.

It is an arithmetic number, because the mean of its divisors is an integer number (29458953090).

Almost surely, 2^252505312140 is an apocalyptic number.

252505312140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252505312140 is an abundant number, since it is smaller than the sum of its proper divisors (454509562020).

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

252505312140 is a wasteful number, since it uses less digits than its factorization.

252505312140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4208421881 (or 4208421879 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 252505312140 its reverse (41213505252), we get a palindrome (293718817392).

The spelling of 252505312140 in words is "two hundred fifty-two billion, five hundred five million, three hundred twelve thousand, one hundred forty".