51343412505 has 96 divisors (see below), whose sum is σ = 105718514688. Its totient is φ = 21036758400.

The previous prime is 51343412459. The next prime is 51343412537. The reversal of 51343412505 is 50521434315.

It is not a de Polignac number, because 51343412505 - 2¹⁴ = 51343396121 is a prime.

It is a super-2 number, since 2×51343412505² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 529314 + ... + 618756.

It is an arithmetic number, because the mean of its divisors is an integer number (1101234528).

Almost surely, 2^51343412505 is an apocalyptic number.

51343412505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51343412505 is an abundant number, since it is smaller than the sum of its proper divisors (54375102183).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51343412505 is a wasteful number, since it uses less digits than its factorization.

51343412505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89547 (or 89540 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 51343412505 in words is "fifty-one billion, three hundred forty-three million, four hundred twelve thousand, five hundred five".