51343684140181 has 4 divisors (see below), whose sum is σ = 51343755032512. Its totient is φ = 51343613247852.

The previous prime is 51343684140139. The next prime is 51343684140197. The reversal of 51343684140181 is 18104148634315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51343684140181 - 2⁹ = 51343684139669 is a prime.

It is a super-2 number, since 2×51343684140181² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343684140101) 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, 34348461 + ... + 35812066.

It is an arithmetic number, because the mean of its divisors is an integer number (12835938758128).

Almost surely, 2^{51343684140181} is an apocalyptic number.

It is an amenable number.

51343684140181 is a deficient number, since it is larger than the sum of its proper divisors (70892331).

51343684140181 is an equidigital number, since it uses as much as digits as its factorization.

51343684140181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70892330.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 51343684140181 in words is "fifty-one trillion, three hundred forty-three billion, six hundred eighty-four million, one hundred forty thousand, one hundred eighty-one".