51344830631 has 4 divisors (see below), whose sum is σ = 51350181432. Its totient is φ = 51339479832.

The previous prime is 51344830619. The next prime is 51344830637. The reversal of 51344830631 is 13603844315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13603844315 = 5 ⋅2720768863.

It is a cyclic number.

It is not a de Polignac number, because 51344830631 - 2¹⁸ = 51344568487 is a prime.

It is a super-2 number, since 2×51344830631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51344830637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2660981 + ... + 2680206.

It is an arithmetic number, because the mean of its divisors is an integer number (12837545358).

Almost surely, 2^51344830631 is an apocalyptic number.

51344830631 is a deficient number, since it is larger than the sum of its proper divisors (5350801).

51344830631 is an equidigital number, since it uses as much as digits as its factorization.

51344830631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5350800.

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

The spelling of 51344830631 in words is "fifty-one billion, three hundred forty-four million, eight hundred thirty thousand, six hundred thirty-one".