51105131225 has 12 divisors (see below), whose sum is σ = 63570279084. Its totient is φ = 40755126720.

The previous prime is 51105131219. The next prime is 51105131249. The reversal of 51105131225 is 52213150115.

It can be written as a sum of positive squares in 6 ways, for example, as 24210115216 + 26895016009 = 155596^2 + 163997^2 .

It is not a de Polignac number, because 51105131225 - 2²⁶ = 51038022361 is a prime.

It is a super-2 number, since 2×51105131225² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51105131194 and 51105131203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3216374 + ... + 3232223.

It is an arithmetic number, because the mean of its divisors is an integer number (5297523257).

Almost surely, 2^51105131225 is an apocalyptic number.

It is an amenable number.

51105131225 is a deficient number, since it is larger than the sum of its proper divisors (12465147859).

51105131225 is a wasteful number, since it uses less digits than its factorization.

51105131225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6448924 (or 6448919 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 51105131225 in words is "fifty-one billion, one hundred five million, one hundred thirty-one thousand, two hundred twenty-five".