251123522223 has 16 divisors (see below), whose sum is σ = 383210320896. Its totient is φ = 143294440800.

The previous prime is 251123522213. The next prime is 251123522257. The reversal of 251123522223 is 322225321152.

It is a happy number.

It is not a de Polignac number, because 251123522223 - 2⁵ = 251123522191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251123522213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8514711 + ... + 8544152.

It is an arithmetic number, because the mean of its divisors is an integer number (23950645056).

Almost surely, 2^251123522223 is an apocalyptic number.

251123522223 is a deficient number, since it is larger than the sum of its proper divisors (132086798673).

251123522223 is a wasteful number, since it uses less digits than its factorization.

251123522223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17059574.

The product of its digits is 14400, while the sum is 30.

Adding to 251123522223 its reverse (322225321152), we get a palindrome (573348843375).

The spelling of 251123522223 in words is "two hundred fifty-one billion, one hundred twenty-three million, five hundred twenty-two thousand, two hundred twenty-three".