251563223241 has 12 divisors (see below), whose sum is σ = 396402654960. Its totient is φ = 152462559480.

The previous prime is 251563223213. The next prime is 251563223243. The reversal of 251563223241 is 142322365152.

251563223241 is a `hidden beast` number, since 2 + 5 + 1 + 5 + 6 + 322 + 324 + 1 = 666.

It is not a de Polignac number, because 251563223241 - 2¹⁴ = 251563206857 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 251563223196 and 251563223205.

It is not an unprimeable number, because it can be changed into a prime (251563223243) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1270521231 + ... + 1270521428.

It is an arithmetic number, because the mean of its divisors is an integer number (33033554580).

Almost surely, 2^251563223241 is an apocalyptic number.

It is an amenable number.

251563223241 is a deficient number, since it is larger than the sum of its proper divisors (144839431719).

251563223241 is a wasteful number, since it uses less digits than its factorization.

251563223241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541042676 (or 2541042673 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

Adding to 251563223241 its reverse (142322365152), we get a palindrome (393885588393).

The spelling of 251563223241 in words is "two hundred fifty-one billion, five hundred sixty-three million, two hundred twenty-three thousand, two hundred forty-one".