251389000140 has 48 divisors (see below), whose sum is σ = 703927197792. Its totient is φ = 67033447936.

The previous prime is 251389000139. The next prime is 251389000141. The reversal of 251389000140 is 41000983152.

It is an interprime number because it is at equal distance from previous prime (251389000139) and next prime (251389000141).

It is not an unprimeable number, because it can be changed into a prime (251389000141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1118512 + ... + 1324328.

It is an arithmetic number, because the mean of its divisors is an integer number (14665149954).

Almost surely, 2^251389000140 is an apocalyptic number.

251389000140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251389000140 is an abundant number, since it is smaller than the sum of its proper divisors (452538197652).

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

251389000140 is a wasteful number, since it uses less digits than its factorization.

251389000140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226186 (or 226184 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

Adding to 251389000140 its reverse (41000983152), we get a palindrome (292389983292).

The spelling of 251389000140 in words is "two hundred fifty-one billion, three hundred eighty-nine million, one hundred forty", and thus it is an aban number.