251223323104 has 24 divisors (see below), whose sum is σ = 532641758040. Its totient is φ = 115949225856.

The previous prime is 251223323069. The next prime is 251223323123. The reversal of 251223323104 is 401323322152.

It is a happy number.

It is a super-2 number, since 2×251223323104² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301950694 + ... + 301951525.

It is an arithmetic number, because the mean of its divisors is an integer number (22193406585).

Almost surely, 2^251223323104 is an apocalyptic number.

It is an amenable number.

251223323104 is an abundant number, since it is smaller than the sum of its proper divisors (281418434936).

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

251223323104 is a wasteful number, since it uses less digits than its factorization.

251223323104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603902242 (or 603902234 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 251223323104 its reverse (401323322152), we get a palindrome (652546645256).

The spelling of 251223323104 in words is "two hundred fifty-one billion, two hundred twenty-three million, three hundred twenty-three thousand, one hundred four".