251113410434421 has 12 divisors (see below), whose sum is σ = 362812114061280. Its totient is φ = 167366135627880.

The previous prime is 251113410434417. The next prime is 251113410434449. The reversal of 251113410434421 is 124434014311152.

251113410434421 is a `hidden beast` number, since 2 + 51 + 1 + 134 + 1 + 0 + 434 + 42 + 1 = 666.

It is not a de Polignac number, because 251113410434421 - 2² = 251113410434417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251113410454421) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3567017991 + ... + 3567088388.

It is an arithmetic number, because the mean of its divisors is an integer number (30234342838440).

Almost surely, 2^{251113410434421} is an apocalyptic number.

It is an amenable number.

251113410434421 is a deficient number, since it is larger than the sum of its proper divisors (111698703626859).

251113410434421 is a wasteful number, since it uses less digits than its factorization.

251113410434421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7134110296 (or 7134110293 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 251113410434421 its reverse (124434014311152), we get a palindrome (375547424745573).

The spelling of 251113410434421 in words is "two hundred fifty-one trillion, one hundred thirteen billion, four hundred ten million, four hundred thirty-four thousand, four hundred twenty-one".