51665042652151 has 4 divisors (see below), whose sum is σ = 52011787905000. Its totient is φ = 51318297399304.

The previous prime is 51665042652149. The next prime is 51665042652169. The reversal of 51665042652151 is 15125624056615.

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 51665042652151 - 2¹ = 51665042652149 is a prime.

It is a super-3 number, since 3×51665042652151³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51665042652095 and 51665042652104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51665042652101) 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, 173372626201 + ... + 173372626498.

It is an arithmetic number, because the mean of its divisors is an integer number (13002946976250).

Almost surely, 2^{51665042652151} is an apocalyptic number.

51665042652151 is a deficient number, since it is larger than the sum of its proper divisors (346745252849).

51665042652151 is a wasteful number, since it uses less digits than its factorization.

51665042652151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346745252848.

The product of its (nonzero) digits is 2160000, while the sum is 49.

The spelling of 51665042652151 in words is "fifty-one trillion, six hundred sixty-five billion, forty-two million, six hundred fifty-two thousand, one hundred fifty-one".