51125101 has 4 divisors (see below), whose sum is σ = 51144604. Its totient is φ = 51105600.

The previous prime is 51125077. The next prime is 51125117. The reversal of 51125101 is 10152115.

51125101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16900 + 51108201 = 130^2 + 7149^2 .

It is a cyclic number.

It is not a de Polignac number, because 51125101 - 2⁷ = 51124973 is a prime.

It is a super-2 number, since 2×51125101² = 5227551904520402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51125131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5070 + ... + 11311.

It is an arithmetic number, because the mean of its divisors is an integer number (12786151).

Almost surely, 2^51125101 is an apocalyptic number.

It is an amenable number.

51125101 is a deficient number, since it is larger than the sum of its proper divisors (19503).

51125101 is a wasteful number, since it uses less digits than its factorization.

51125101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19502.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 51125101 is about 7150.1818857984. The cubic root of 51125101 is about 371.1459504273.

Adding to 51125101 its reverse (10152115), we get a palindrome (61277216).

The spelling of 51125101 in words is "fifty-one million, one hundred twenty-five thousand, one hundred one".