251145222245 has 16 divisors (see below), whose sum is σ = 304665212928. Its totient is φ = 198731776320.

The previous prime is 251145222227. The next prime is 251145222269. The reversal of 251145222245 is 542222541152.

It is a happy number.

It is not a de Polignac number, because 251145222245 - 2⁸ = 251145221989 is a prime.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 387254 + ... + 807623.

It is an arithmetic number, because the mean of its divisors is an integer number (19041575808).

Almost surely, 2^251145222245 is an apocalyptic number.

It is an amenable number.

251145222245 is a deficient number, since it is larger than the sum of its proper divisors (53519990683).

251145222245 is a wasteful number, since it uses less digits than its factorization.

251145222245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195340.

The product of its digits is 64000, while the sum is 35.

Adding to 251145222245 its reverse (542222541152), we get a palindrome (793367763397).

The spelling of 251145222245 in words is "two hundred fifty-one billion, one hundred forty-five million, two hundred twenty-two thousand, two hundred forty-five".