251345323245 has 64 divisors (see below), whose sum is σ = 418970382336. Its totient is φ = 128579700480.

The previous prime is 251345323241. The next prime is 251345323261. The reversal of 251345323245 is 542323543152.

251345323245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 251345323245 - 2² = 251345323241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251345323241) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 9291790 + ... + 9318800.

It is an arithmetic number, because the mean of its divisors is an integer number (6546412224).

Almost surely, 2^251345323245 is an apocalyptic number.

It is an amenable number.

251345323245 is a deficient number, since it is larger than the sum of its proper divisors (167625059091).

251345323245 is a wasteful number, since it uses less digits than its factorization.

251345323245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27330.

The product of its digits is 432000, while the sum is 39.

Adding to 251345323245 its reverse (542323543152), we get a palindrome (793668866397).

The spelling of 251345323245 in words is "two hundred fifty-one billion, three hundred forty-five million, three hundred twenty-three thousand, two hundred forty-five".