51166203015511 has 4 divisors (see below), whose sum is σ = 51166237132224. Its totient is φ = 51166168898800.

The previous prime is 51166203015481. The next prime is 51166203015517. The reversal of 51166203015511 is 11551030266115.

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 51166203015511 - 2²⁵ = 51166169461079 is a prime.

It is a super-2 number, since 2×51166203015511² (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 (51166203015517) 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, 14700070 + ... + 17844451.

It is an arithmetic number, because the mean of its divisors is an integer number (12791559283056).

Almost surely, 2^{51166203015511} is an apocalyptic number.

51166203015511 is a deficient number, since it is larger than the sum of its proper divisors (34116713).

51166203015511 is a wasteful number, since it uses less digits than its factorization.

51166203015511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34116712.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 51166203015511 in words is "fifty-one trillion, one hundred sixty-six billion, two hundred three million, fifteen thousand, five hundred eleven".