51105125 has 8 divisors (see below), whose sum is σ = 63779352. Its totient is φ = 40884000.

The previous prime is 51105107. The next prime is 51105137. The reversal of 51105125 is 52150115.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1515361 + 49589764 = 1231^2 + 7042^2 .

It is not a de Polignac number, because 51105125 - 2¹⁶ = 51039589 is a prime.

It is a super-2 number, since 2×51105125² = 5223467602531250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51105097 and 51105106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204296 + ... + 204545.

It is an arithmetic number, because the mean of its divisors is an integer number (7972419).

Almost surely, 2^51105125 is an apocalyptic number.

It is an amenable number.

51105125 is a deficient number, since it is larger than the sum of its proper divisors (12674227).

51105125 is an equidigital number, since it uses as much as digits as its factorization.

51105125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408856 (or 408846 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 51105125 is about 7148.7848617790. The cubic root of 51105125 is about 371.0976051123.

The spelling of 51105125 in words is "fifty-one million, one hundred five thousand, one hundred twenty-five".