51343742813 has 24 divisors (see below), whose sum is σ = 57481191264. Its totient is φ = 45818641440.

The previous prime is 51343742809. The next prime is 51343742861. The reversal of 51343742813 is 31824734315.

It is a happy number.

It is not a de Polignac number, because 51343742813 - 2² = 51343742809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343747813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1560470 + ... + 1593032.

It is an arithmetic number, because the mean of its divisors is an integer number (2395049636).

Almost surely, 2^51343742813 is an apocalyptic number.

It is an amenable number.

51343742813 is a deficient number, since it is larger than the sum of its proper divisors (6137448451).

51343742813 is a wasteful number, since it uses less digits than its factorization.

51343742813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32825 (or 32814 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The spelling of 51343742813 in words is "fifty-one billion, three hundred forty-three million, seven hundred forty-two thousand, eight hundred thirteen".