251212052425205 has 8 divisors (see below), whose sum is σ = 303196974257592. Its totient is φ = 199807967708608.

The previous prime is 251212052425163. The next prime is 251212052425273. The reversal of 251212052425205 is 502524250212152.

It can be written as a sum of positive squares in 4 ways, for example, as 12193742738116 + 239018309687089 = 3491954^2 + 15460217^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 251212052425205 - 2¹⁶ = 251212052359669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145209277994 + ... + 145209279723.

It is an arithmetic number, because the mean of its divisors is an integer number (37899621782199).

Almost surely, 2^{251212052425205} is an apocalyptic number.

It is an amenable number.

251212052425205 is a deficient number, since it is larger than the sum of its proper divisors (51984921832387).

251212052425205 is a wasteful number, since it uses less digits than its factorization.

251212052425205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290418557895.

The product of its (nonzero) digits is 160000, while the sum is 38.

The spelling of 251212052425205 in words is "two hundred fifty-one trillion, two hundred twelve billion, fifty-two million, four hundred twenty-five thousand, two hundred five".