251340215068 has 48 divisors (see below), whose sum is σ = 475121687040. Its totient is φ = 115947849600.

The previous prime is 251340215023. The next prime is 251340215107. The reversal of 251340215068 is 860512043152.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1708605 + ... + 1849867.

It is an arithmetic number, because the mean of its divisors is an integer number (9898368480).

Almost surely, 2^251340215068 is an apocalyptic number.

It is an amenable number.

251340215068 is a deficient number, since it is larger than the sum of its proper divisors (223781471972).

251340215068 is a wasteful number, since it uses less digits than its factorization.

251340215068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141898 (or 141896 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 251340215068 in words is "two hundred fifty-one billion, three hundred forty million, two hundred fifteen thousand, sixty-eight".