251321344431113 has 8 divisors (see below), whose sum is σ = 274222361333856. Its totient is φ = 228429264520800.

The previous prime is 251321344431107. The next prime is 251321344431127. The reversal of 251321344431113 is 311134443123152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 251321344431113 - 2¹⁴ = 251321344414729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251321344431173) 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 7 ways as a sum of consecutive naturals, for example, 2234189303 + ... + 2234301788.

It is an arithmetic number, because the mean of its divisors is an integer number (34277795166732).

Almost surely, 2^{251321344431113} is an apocalyptic number.

It is an amenable number.

251321344431113 is a deficient number, since it is larger than the sum of its proper divisors (22901016902743).

251321344431113 is a wasteful number, since it uses less digits than its factorization.

251321344431113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468496215.

The product of its digits is 103680, while the sum is 38.

Adding to 251321344431113 its reverse (311134443123152), we get a palindrome (562455787554265).

The spelling of 251321344431113 in words is "two hundred fifty-one trillion, three hundred twenty-one billion, three hundred forty-four million, four hundred thirty-one thousand, one hundred thirteen".