51343253587805 has 16 divisors (see below), whose sum is σ = 62027938138800. Its totient is φ = 40798099077120.

The previous prime is 51343253587771. The next prime is 51343253587807. The reversal of 51343253587805 is 50878535234315.

It can be written as a sum of positive squares in 8 ways, for example, as 9781468921156 + 41561784666649 = 3127534^2 + 6446843^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51343253587805 is a prime.

It is a super-2 number, since 2×51343253587805² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343253587807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52773620 + ... + 53737709.

It is an arithmetic number, because the mean of its divisors is an integer number (3876746133675).

Almost surely, 2^{51343253587805} is an apocalyptic number.

It is an amenable number.

51343253587805 is a deficient number, since it is larger than the sum of its proper divisors (10684684550995).

51343253587805 is a wasteful number, since it uses less digits than its factorization.

51343253587805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106511984.

The product of its (nonzero) digits is 60480000, while the sum is 59.

The spelling of 51343253587805 in words is "fifty-one trillion, three hundred forty-three billion, two hundred fifty-three million, five hundred eighty-seven thousand, eight hundred five".