251220304342052 has 12 divisors (see below), whose sum is σ = 441269865435420. Its totient is φ = 125143199931936.

The previous prime is 251220304341911. The next prime is 251220304342069. The reversal of 251220304342052 is 250243403022152.

It can be written as a sum of positive squares in 2 ways, for example, as 13820743075876 + 237399561266176 = 3717626^2 + 15407776^2 .

It is a super-3 number, since 3×251220304342052³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 3 ways as a sum of consecutive naturals, for example, 116738058563 + ... + 116738060714.

It is an arithmetic number, because the mean of its divisors is an integer number (36772488786285).

Almost surely, 2^{251220304342052} is an apocalyptic number.

It is an amenable number.

251220304342052 is a deficient number, since it is larger than the sum of its proper divisors (190049561093368).

251220304342052 is a wasteful number, since it uses less digits than its factorization.

251220304342052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233476119550 (or 233476119548 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

The spelling of 251220304342052 in words is "two hundred fifty-one trillion, two hundred twenty billion, three hundred four million, three hundred forty-two thousand, fifty-two".