51318051331 has 4 divisors (see below), whose sum is σ = 51382441152. Its totient is φ = 51253661512.

The previous prime is 51318051293. The next prime is 51318051409. The reversal of 51318051331 is 13315081315.

51318051331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51318051331 - 2¹⁷ = 51317920259 is a prime.

It is a super-2 number, since 2×51318051331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51318051293 and 51318051302.

It is not an unprimeable number, because it can be changed into a prime (51318051931) 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, 32193715 + ... + 32195308.

It is an arithmetic number, because the mean of its divisors is an integer number (12845610288).

Almost surely, 2^51318051331 is an apocalyptic number.

51318051331 is a deficient number, since it is larger than the sum of its proper divisors (64389821).

51318051331 is an equidigital number, since it uses as much as digits as its factorization.

51318051331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64389820.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 51318051331 in words is "fifty-one billion, three hundred eighteen million, fifty-one thousand, three hundred thirty-one".