51105500051 has 16 divisors (see below), whose sum is σ = 52947772416. Its totient is φ = 49294440000.

The previous prime is 51105500029. The next prime is 51105500053. The reversal of 51105500051 is 15000550115.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51105500051 - 2⁶ = 51105499987 is a prime.

It is a super-2 number, since 2×51105500051² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51105500053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1437986 + ... + 1473096.

It is an arithmetic number, because the mean of its divisors is an integer number (3309235776).

Almost surely, 2^51105500051 is an apocalyptic number.

51105500051 is a deficient number, since it is larger than the sum of its proper divisors (1842272365).

51105500051 is a wasteful number, since it uses less digits than its factorization.

51105500051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35554.

The product of its (nonzero) digits is 625, while the sum is 23.

The spelling of 51105500051 in words is "fifty-one billion, one hundred five million, five hundred thousand, fifty-one".