250644242225 has 36 divisors (see below), whose sum is σ = 337856490756. Its totient is φ = 184370135040.

The previous prime is 250644242209. The next prime is 250644242287. The reversal of 250644242225 is 522242446052.

It can be written as a sum of positive squares in 18 ways, for example, as 237918597361 + 12725644864 = 487769^2 + 112808^2 .

It is not a de Polignac number, because 250644242225 - 2⁴ = 250644242209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 970409 + ... + 1201241.

It is an arithmetic number, because the mean of its divisors is an integer number (9384902521).

Almost surely, 2^250644242225 is an apocalyptic number.

250644242225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

250644242225 is a deficient number, since it is larger than the sum of its proper divisors (87212248531).

250644242225 is a wasteful number, since it uses less digits than its factorization.

250644242225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231126 (or 231108 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 38.

Adding to 250644242225 its reverse (522242446052), we get a palindrome (772886688277).

The spelling of 250644242225 in words is "two hundred fifty billion, six hundred forty-four million, two hundred forty-two thousand, two hundred twenty-five".