51051161069 has 4 divisors (see below), whose sum is σ = 51073273020. Its totient is φ = 51029049120.

The previous prime is 51051161059. The next prime is 51051161101. The reversal of 51051161069 is 96016115015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96016115015 = 5 ⋅19203223003.

It can be written as a sum of positive squares in 2 ways, for example, as 46089649225 + 4961511844 = 214685^2 + 70438^2 .

It is a cyclic number.

It is not a de Polignac number, because 51051161069 - 2²⁰ = 51050112493 is a prime.

It is a super-2 number, since 2×51051161069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51051161059) 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, 11052512 + ... + 11057129.

It is an arithmetic number, because the mean of its divisors is an integer number (12768318255).

Almost surely, 2^51051161069 is an apocalyptic number.

It is an amenable number.

51051161069 is a deficient number, since it is larger than the sum of its proper divisors (22111951).

51051161069 is a wasteful number, since it uses less digits than its factorization.

51051161069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22111950.

The product of its (nonzero) digits is 8100, while the sum is 35.

The spelling of 51051161069 in words is "fifty-one billion, fifty-one million, one hundred sixty-one thousand, sixty-nine".