251212052425145 has 12 divisors (see below), whose sum is σ = 350671518079524. Its totient is φ = 172259693091360.

The previous prime is 251212052425109. The next prime is 251212052425163. The reversal of 251212052425145 is 541524250212152.

It can be written as a sum of positive squares in 2 ways, for example, as 45390793578361 + 205821258846784 = 6737269^2 + 14346472^2 .

It is not a de Polignac number, because 251212052425145 - 2⁴² = 246814005914041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 512677657766 + ... + 512677658255.

It is an arithmetic number, because the mean of its divisors is an integer number (29222626506627).

Almost surely, 2^{251212052425145} is an apocalyptic number.

It is an amenable number.

251212052425145 is a deficient number, since it is larger than the sum of its proper divisors (99459465654379).

251212052425145 is a wasteful number, since it uses less digits than its factorization.

251212052425145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025355316040 (or 1025355316033 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 41.

The spelling of 251212052425145 in words is "two hundred fifty-one trillion, two hundred twelve billion, fifty-two million, four hundred twenty-five thousand, one hundred forty-five".