251304255140 has 24 divisors (see below), whose sum is σ = 527908268160. Its totient is φ = 100489448288.

The previous prime is 251304255113. The next prime is 251304255161. The reversal of 251304255140 is 41552403152.

251304255140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 251304255097 and 251304255106.

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 7 ways as a sum of consecutive naturals, for example, 1951922 + ... + 2076681.

It is an arithmetic number, because the mean of its divisors is an integer number (21996177840).

Almost surely, 2^251304255140 is an apocalyptic number.

251304255140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251304255140 is an abundant number, since it is smaller than the sum of its proper divisors (276604013020).

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

251304255140 is a wasteful number, since it uses less digits than its factorization.

251304255140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031731 (or 4031729 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 251304255140 its reverse (41552403152), we get a palindrome (292856658292).

The spelling of 251304255140 in words is "two hundred fifty-one billion, three hundred four million, two hundred fifty-five thousand, one hundred forty".