51011051051 has 4 divisors (see below), whose sum is σ = 51114943704. Its totient is φ = 50907158400.

The previous prime is 51011050999. The next prime is 51011051099. The reversal of 51011051051 is 15015011015.

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 51011051051 - 2²⁶ = 50943942187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51011059051) 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, 51945590 + ... + 51946571.

It is an arithmetic number, because the mean of its divisors is an integer number (12778735926).

Almost surely, 2^51011051051 is an apocalyptic number.

51011051051 is a deficient number, since it is larger than the sum of its proper divisors (103892653).

51011051051 is a wasteful number, since it uses less digits than its factorization.

51011051051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103892652.

The product of its (nonzero) digits is 125, while the sum is 20.

Adding to 51011051051 its reverse (15015011015), we get a palindrome (66026062066).

The spelling of 51011051051 in words is "fifty-one billion, eleven million, fifty-one thousand, fifty-one".