251434221234 has 16 divisors (see below), whose sum is σ = 574706791488. Its totient is φ = 71838348912.

The previous prime is 251434221217. The next prime is 251434221239. The reversal of 251434221234 is 432122434152.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 251434221195 and 251434221204.

It is not an unprimeable number, because it can be changed into a prime (251434221239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2993264497 + ... + 2993264580.

It is an arithmetic number, because the mean of its divisors is an integer number (35919174468).

Almost surely, 2^251434221234 is an apocalyptic number.

251434221234 is an abundant number, since it is smaller than the sum of its proper divisors (323272570254).

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

251434221234 is a wasteful number, since it uses less digits than its factorization.

251434221234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5986529089.

The product of its digits is 46080, while the sum is 33.

Adding to 251434221234 its reverse (432122434152), we get a palindrome (683556655386).

The spelling of 251434221234 in words is "two hundred fifty-one billion, four hundred thirty-four million, two hundred twenty-one thousand, two hundred thirty-four".