51131405320323 has 8 divisors (see below), whose sum is σ = 68230589070336. Its totient is φ = 34059912558600.

The previous prime is 51131405320319. The next prime is 51131405320361. The reversal of 51131405320323 is 32302350413115.

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

It is not a de Polignac number, because 51131405320323 - 2² = 51131405320319 is a prime.

It is a super-2 number, since 2×51131405320323² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51131405320823) 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, 6922742763 + ... + 6922750148.

It is an arithmetic number, because the mean of its divisors is an integer number (8528823633792).

Almost surely, 2^{51131405320323} is an apocalyptic number.

51131405320323 is a deficient number, since it is larger than the sum of its proper divisors (17099183750013).

51131405320323 is a wasteful number, since it uses less digits than its factorization.

51131405320323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13845494145.

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 51131405320323 its reverse (32302350413115), we get a palindrome (83433755733438).

The spelling of 51131405320323 in words is "fifty-one trillion, one hundred thirty-one billion, four hundred five million, three hundred twenty thousand, three hundred twenty-three".