51135752211 has 4 divisors (see below), whose sum is σ = 68181002952. Its totient is φ = 34090501472.

The previous prime is 51135752153. The next prime is 51135752233. The reversal of 51135752211 is 11225753115.

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 51135752211 - 2¹¹ = 51135750163 is a prime.

It is a super-2 number, since 2×51135752211² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51135752251) 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, 8522625366 + ... + 8522625371.

It is an arithmetic number, because the mean of its divisors is an integer number (17045250738).

Almost surely, 2^51135752211 is an apocalyptic number.

51135752211 is a deficient number, since it is larger than the sum of its proper divisors (17045250741).

51135752211 is a wasteful number, since it uses less digits than its factorization.

51135752211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17045250740.

The product of its digits is 10500, while the sum is 33.

The spelling of 51135752211 in words is "fifty-one billion, one hundred thirty-five million, seven hundred fifty-two thousand, two hundred eleven".