251023113222 has 24 divisors (see below), whose sum is σ = 584012957976. Its totient is φ = 71720889408.

The previous prime is 251023113203. The next prime is 251023113233. The reversal of 251023113222 is 222311320152.

It is a junction number, because it is equal to n+sod(n) for n = 251023113192 and 251023113201.

It is a congruent number.

It is an unprimeable number.

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, 426909763 + ... + 426910350.

It is an arithmetic number, because the mean of its divisors is an integer number (24333873249).

Almost surely, 2^251023113222 is an apocalyptic number.

251023113222 is an abundant number, since it is smaller than the sum of its proper divisors (332989844754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251023113222 is a wasteful number, since it uses less digits than its factorization.

251023113222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853820132 (or 853820125 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 251023113222 its reverse (222311320152), we get a palindrome (473334433374).

The spelling of 251023113222 in words is "two hundred fifty-one billion, twenty-three million, one hundred thirteen thousand, two hundred twenty-two".