51110001065 has 4 divisors (see below), whose sum is σ = 61332001284. Its totient is φ = 40888000848.

The previous prime is 51110001053. The next prime is 51110001091. The reversal of 51110001065 is 56010001115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56010001115 = 5 ⋅11202000223.

It can be written as a sum of positive squares in 2 ways, for example, as 39152141161 + 11957859904 = 197869^2 + 109352^2 .

It is a cyclic number.

It is not a de Polignac number, because 51110001065 - 2⁴ = 51110001049 is a prime.

It is a super-2 number, since 2×51110001065² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5111000102 + ... + 5111000111.

It is an arithmetic number, because the mean of its divisors is an integer number (15333000321).

Almost surely, 2^51110001065 is an apocalyptic number.

It is an amenable number.

51110001065 is a deficient number, since it is larger than the sum of its proper divisors (10222000219).

51110001065 is a wasteful number, since it uses less digits than its factorization.

51110001065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10222000218.

The product of its (nonzero) digits is 150, while the sum is 20.

The spelling of 51110001065 in words is "fifty-one billion, one hundred ten million, one thousand, sixty-five".