51210343022651 has 4 divisors (see below), whose sum is σ = 51467681430000. Its totient is φ = 50953004615304.

The previous prime is 51210343022639. The next prime is 51210343022693. The reversal of 51210343022651 is 15622034301215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51210343022651 - 2³⁴ = 51193163153467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51210343024651) 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, 128669203376 + ... + 128669203773.

It is an arithmetic number, because the mean of its divisors is an integer number (12866920357500).

Almost surely, 2^{51210343022651} is an apocalyptic number.

51210343022651 is a deficient number, since it is larger than the sum of its proper divisors (257338407349).

51210343022651 is a wasteful number, since it uses less digits than its factorization.

51210343022651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257338407348.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 51210343022651 its reverse (15622034301215), we get a palindrome (66832377323866).

The spelling of 51210343022651 in words is "fifty-one trillion, two hundred ten billion, three hundred forty-three million, twenty-two thousand, six hundred fifty-one".